general problems of the 2017 Honda CR-V - part 1

All warning lamps have been coming on at random times. The dealerships have always said there is no problem. Now, outside of warranty, I am reading that it's possible that the problem is that all of the fuel injectors need to be replaced. Online notes that this is a widespread issue with this particular vehicle. I was informed that I can disconnect the battery and it resets the system and warning lamps - sometimes for hours, sometimes for days/weeks.

My car stalls out when accelerating. The same issue explained by NHTSA recall 23v-858 but my VIN is not included in the recall and it's a 2017 Honda crv. I have almost been re ended when it stalls in traffic.

All brake systems warning lamps illuminated while driving on the highway, the vehicle was pulled off the road and shut off, brakes were visually inspected and all fluid levels were examined and everything was intact. Vehicle was driven again after a breif time and everything was fine. A few weeks later all warning lamps were displayed, the vehicle was brought to a Honda dealership the following morning and a cracked fuel pump was diagnosed and the technician believed that there was no coolant in the vehicle and that was filled. The technicians suggested a scope of the engine to rule out a leaking head gasket but I could not afford it and monitored my coolant levels, had a pressure test done at a trusted mechanic and everything was fine for approx 3 months. Absolutely no coolant was observed on my driveway, the coolant level remained optimal on visual inspection. The vehicle started to drive roughly and I suspected new spark plugs were needed, those were installed at the dealership. The issue was not resolved and I returned w/in 1 month and was told that 3/4 cylinders were blown in addition to the head gasket. The vehicle has 106k miles and has received all maintenance as described. The cost to repair is over $8,000. I believe this is a failure on Honda as this is a very well documented issue with this specific vehicle.

Cylinder 2 and 4 misfire, that will cause all the sensor lights to come on and the vehicle will stall out. Doesn't matter if driving 15 mph or 55 mph, it will just stall.

5th generation (2017-2022) Honda crv displaying all driver assistance system errors (stability control, cruise control, emergency anti-collision etc), check engine light, tire pressure monitor malfunction, parking brake, and some other lights. *obdii scan reads back p0303* battery was replaced in 2025, and has never tested at low voltage. Recently tested battery 04/26/2026 at 14. 51v (with engine running). Spark plugs replaced 04/26/2026 with oem ngk plugs with oe gap 0. 030". Drove car for 10 minutes and lights didn't go away. Upon researching, this appears to be a "replace all fuel injectors" job. Which also appears to be a fairly common issue in these crvs. My concern is that the misfire is disabling all driver safety systems and forcing the car into limp mode, and seems to be manufacturer error/negligence in terms of part reliability/quality. These parts are also on a 6-9 month back order because of how common the issue is. Honda released "service bulletin 19-032" as a means to make dealers aware of the issue but I find this dishonest to the customers and Honda owners who purchase the vehicles on the promise of reliability. Please look into this issue, as it seems to happen just outside of warranty on these cars. Honda scarcely giving out goodwill refunds/assistance for their factory-issue.

I have a 2017 crv 1. 5t. I currently have confirmed fuel dilution and a p219f (emission systems problem) code. Records show TSB 18-114 was performed as Honda tried to fix the fuel dilution problem through an ecm software update but it did not fix the issue. They followed it up with TSB 19-067 which was to further update the ecm software. The problem is this was not applied to all crv 1. 5t including mine. This is known ongoing defect and leads to car going into limp mode in highway driving. That is dangerous and a safety hazard. Honda should update the ecm software fix for all Honda crvs using the 1. 5t and replace faulty fuel injectors.

On March 28, 2026, the check engine light illuminated on my 2017 Honda Cr-v ex (VIN [xxx] ) at 59,057 miles. I pulled diagnostic trouble codes with a consumer obd-ii reader and recorded p0301, p0302, and p0303. On March 30, 2026, I contacted american Honda customer service to request goodwill repair assistance. I was told to obtain an authorized dealer diagnostic and resubmit. I did so. On March 31, 2026, I had goudy Honda perform an authorized diagnostic (repair order #315466. Goudy confirmed the stored dtcs were p0300 (random misfire detected), p0301 (cylinder 1 misfire detected), and p0302 (cylinder 2 misfire detected). The dealer recommended replacement of all four fuel injectors at a quoted cost of $1,961. 17 plus tax, and stated the injectors were out of factory, powertrain, and emission warranties. This dtc set (p0300–p0304 and p0172) is the exact set addressed by american Honda motor CO. 's own service bulletin 18-124 and service bulletin 19-037. On April 10, 2026, Honda corporate denied assistance on the ground that the vehicle is "out of warranty. " on April 20, 2026, a Honda corporate representative named desiree called me to say that american Honda will not document in writing the reasoning for the denial and will send only a generic template. This matches the pattern of consumer complaints described in bissell v. American Honda motor CO which catalogs hundreds of similar odi complaints and alleges that american Honda has known of, and concealed, a defect in its 1. 5l I-vtec turbocharged engine since at least 2016. Safety concern: misfire events at freeway speed produce sudden loss of power, limp-mode activation, and the risk of unexpected deceleration in traffic. The class complaint documents multiple incidents of sudden stalls and engine failures in comparable vehicles, including on highways. I am filing this complaint to ensure odi has a record of this incident and to support any existing or future investigation of this engine. Information redacted pursuant to the freedom of information act (foia).

System/component involved: fuel system / fuel injectors / high-pressure fuel joint pipe description of incident and safety risk: my 2017 Honda Cr-v (1. 5t engine) experienced a fuel system failure evidenced by dtc p0172 and a failed af cylinder test, confirmed by an authorized Honda dealer. This failure leads to engine hesitation and power loss, creating a safety hazard during operation. More critically, during the repair (case #16244235), the dealer and manufacturer refused to replace the high-pressure fuel joint pipe. According to Honda’s official service manual and tsbs for the earth dreams 1. 5t engine, this pipe is a mandatory, one-time-use component that must be replaced whenever fuel injectors are serviced. Reusing this component violates Honda’s own safety protocols and poses a severe fire risk due to potential fuel leakage under high pressure ($20\text{ mpa}$+). Safety risk to others: reinstalling a non-reusable high-pressure fuel line creates a high probability of fuel spraying onto hot engine components, leading to an under-hood fire while driving. This endangers the occupants and others on the road. Reproduction and inspection: the injector failure was confirmed by [insert dealer name] in houston, TX. The subsequent safety violation (failure to replace the mandatory fuel joint pipe) is documented on my repair invoice dated April 2026. The vehicle and the old part (if still on the car) are available for inspection. Symptoms and warning lamps: the check engine light (dtc p0172) appeared shortly before the failure, accompanied by a strong gasoline odor and engine stalling symptoms.

First owner of a newly purchased 2017 Honda Cr-v that has been well and regularly maintained. Driving at 25mph in a city and every single warning light and dash light simultaneously came on. Every single one -- brakes, headlights, emergency brake, engine, etc. Eventually codes read off the car's computer showed p0172, p219c, p219f -- all of these codes relate to the fuel injectors. I brought the car to a Honda dealer and they confirmed that all of the fuel injectors needed to be replaced and said the fuel injectors are "faulty" and "from a bad batch. " lots of Honda forums online talking about faulty fuel injectors. A whole thread on 2017 Cr-v fuel injector problems can be easily found online along with service bulletins for fuel injector problems (with the code p0172) for similar year, different model Honda vehicles. The dealership confirmed the fuel injector problem but then said they couldn't source the parts despite a "global search" and putting us on a "critical list. " we then went to a competent independent mechanic who was able to source Honda oem fuel injector replacement kit from a different Honda dealership (not sure why the first Honda dealership couldn't get the parts then. . . ) the independent mechanic said the fuel injectors looked "terrible" and "definitely faulty. " he sent us home with the old parts, which we have and could supply. Faulty fuel injectors affecting the propulsion system feels unsafe and the fact that Honda told us "you are out of luck" with regard to replacements was especially aggravating. We had no chance to pursue a goodwill repair of the issue even though our independent mechanic did find the parts at Honda in spite of the first dealership's claim of a global search. The service that was performed included replacing all fuel injectors and whatever is in the associated oem kit. In summary, fuel injector problems caused all warning lights to come in, dealership confirmed problem, mechanic repaired, many reports of same issue online.

We are experiencing fule injector issues which causes all the systems to switch off, and has caused issues with the car starting, battery draining and issues in getting the car to accelerate. This car has only 110000 miles and should not be having issues this early.

I was pumping gas and during gas started pouring out by the rear tire flap. It was not a whole tank but a large amount. And the next day also noticed a puddle where gas tank lies. This has happened in the past but sporadically and not all of the gas comes out. Also, there is a safety recall on rear fuel feed pipe leaks and fuel pump motor but supposedly not on this particular vehicle year/VIN.

2017 Honda crv touring with VIN [xxx] . My son and daughter drove the car and all of a sudden all the lights started going off( it looks like christmas lights). We got it scanned multiple times from different places where they have the scanner. It was showing p0304 misfire #4 cylinder and u0401-68 ecm failure. We took it to the dealer and they found out the same code fuel injector needs to be replaced. I am single mom and didn't have the money to get it fix. Our car only had less than 21k. I stayed up to do more research online. Found out more about this common issues with same model. I contacted another dealer, explained my situation and he advised me to call Honda corp to be added to the recall and mention goodwill. I immediately called the corporate but had to wait for their case mgr to get back with us. I asked my daughter to call the dealer where we got our car diagnosed, to ask svc advisor if it is safe to use the car and we were advised that it's ok to use. However my daughter was driving the car and all of a sudden it wasn't accelerating and only going around 5 miles per hour. She had to go back home and missed her classes. She was scared and I could just imagine how scary that was. How about if this happened when she was in the freeway? this could have caused a major accident. I don't understand why Honda only issued the recall to some cars with same model as ours if they already have lots of customers having same issue. I even read this issue was featured on abc news. Honda did offer to help with lowering the fuel injector but I still have to pay $899. 19 and around $204 for diagnosis. The svc advisor said they've been having a lot of same model cars coming in for fuel injector problems. I am reaching out hoping you can help direct us in getting the full reimbursement and hoping our car can be added to the recall so we can get reimburse. Honda should be fully liable for this due to known issue. Date below was one incident. Information redacted pursuant to the freedom of information act.

Vehicle cycled through all of the warnings on the dashboard and lost power when trying to accelerate and engine light came on. Stalled on the side of the highway and had to be towed. Mechanic said the code for the issue was the catalytic converter and O2 sensor.

When driving on the interstate, the car speed went from 75 mph to 10-20 mph over 20 miles. The engine light came on, and the car would not go any faster than 10-20 mph. It was extremely nerve racking trying to get off the interstate and attempt to limp in to topeka KS. It was very cold that day as well.

Recently, all of the warning lights on the car went off all at once and wouldn’t turn off even if I turn the car off/on. There was no issue leading up to this but after taking it into Honda and getting a second opinion, it is due to faulty fuel injectors and the repair total will be $1,800. The repairs are necessary because of safety issues associated with the fuel injectors. Other Honda vehicles with the same injectors have an extended warranty (150,000 miles) but Honda crv’s do not. I read 100+ reviews other users having the same issue. I’d like Honda to step in and at least give an extended warranty.

On December 31, on my way to work driving 58mph on the highway, the car slows down in traffic on the highway and the dashboard lights up. I avoided a wreck, narrowly. I put on my flashers and coast to the nearest gas station. I turned the car off and waited 10 minutes or so and proceed to drive home with the flashers on, the car seemed to be ok and I was 10 minutes from my house then the car slows down again to 7 mph so I drove like that with the flashers holding up traffic praying I'd make it home. It stalled crossing the train tracks but I made it home. I called a mechanic that hooked it up to a device to read the codes and he informed me about the fuel injector and that it was common for the make and model of my Honda Cr-v to have this problem. The cost is exorbitant and Honda should bear some if not all of the cost for replacement.

I am reporting a recurring safety issue with my 2017 Honda Cr-v. The vehicle has experienced repeated incidents where multiple warning lights suddenly illuminate at the same time. In some instances, the lights disappear temporarily and then return. I replaced the battery, but the warning lights returned within two weeks. About one year ago, the Honda dealer recommended replacing all four fuel injectors, which I did at significant cost. Despite this repair, the problem reoccurred. Most recently, all warning lights came on again and the vehicle lost power and became undrivable. This presents a serious safety concern, especially if it occurs while driving. I have learned that many other 2017 Honda Cr-v owners report similar fuel injector and warning-light issues. I believe this may indicate a widespread defect and request that NHTSA investigate this matter for potential recall or corrective action. Thank you for pay close attention to this matter!.

All fuel injectors need to be replaced. I know 2 other people with crv's that have had the same exact issue and had to have them replaced. It is also all over forums on the internet. Service people at Honda also told me it is a known issue with the fuel injectors in the Honda 4 cylinders until 2023. I have a quote for almost $1700. I currently own 2 Honda crv's and one is a 2022 so I am expecting that one to eventually need the fuel injectors also. I am bringing the car in for service on 12/15 to have this done. I feel like this should be investigated to bring a recall. When people that work at repair facilities say the only way to bring this to light is to report it to this agency and try to get a recall since Honda isn't going to issue the recall on their own.

1. Please see my letter to Honda. 2. I drove for months with all of my warning lights on, not being able to tell what was actually wrong with my car/note being able to afford to fix my car that isn't even paid off. See letter to Honda. 3. Yes. It has been confirmed by my local Honda dealer as well as an independent service center. 4. I have filed a complaint with Honda. 5. Yes. All of my warning lights in the car would flash/stay on making it very difficult to figure out what the issue actually was. Letter: I am writing to follow up on my recent communication with Honda’s goodwill department regarding the fuel injector failure on my 2017 Honda Cr-v. This situation has caused significant financial burden & frustration with a brand I have always trusted. Over a year ago, the fuel injectors began intermittently triggering the vehicle’s computer system, despite there being no actual mechanical issue. At that time, Honda acknowledged this was a “common” problem with this model year & advised it was safe to continue driving since the sensor was only barely tripping the system. I hoped Honda would issue a recall or extended warranty, as this is a known and widespread defect. That never occurred. This past weekend, the sensor failed completely & required immediate replacement at a cost of $1,000+—nearly identical to the estimate Honda provided over a year ago. My vehicle has only 96,000 miles, is not yet paid off, & was purchased as a certified pre-owned Honda. These factors are precisely why I have remained loyal to Honda. It is extremely frustrating that this same issue is covered under a recall or extended warranty for the 2018 Cr-v, while the 2017 model—despite having the same known defect—is excluded. This inconsistency feels unfair, especially since Honda acknowledged this issue directly. I am requesting reconsideration for assistance. This failure was not due to misuse or neglect but a known defect that occurred prematurely. I hope Honda will stand behind its reputation.

2017 Honda cr v- hybrid (under 10 year under 150,000 miles) all warning lights on the dashboard—including the check engine light, oil pressure warning, battery warning light, tire pressure monitoring system (tpms) light, brake system warning, abs (anti-lock braking system) light, fuel level warning light, and engine temperature warning light—activated intermittently. This issue intermittently occurred each time the vehicle was started, with symptoms lasting from a few days up to several weeks. The warning lights would temporarily resolve, with periods lasting from a few days to several months. The vehicle's battery was replaced twice within one year, which seemed to temporarily alleviate the issue; however, the warning lights recurred afterward. Recently, Honda was able to conduct a thorough diagnosis with the lights going off and seems to have identified the root cause, leading to the replacement of the spark plugs and fuel injectors at an approximate cost of $2,000. If unaddressed, this issue could pose safety risks such as rough idling, decreased fuel efficiency, engine misfires, difficulty starting, poor acceleration, unexpected stalling, sudden complete loss of power, and electrical problems. This issue is recognized by Honda and is currently covered under a recall for the 2023-2025 Honda pilot and the 2023-2025 Honda accord hybrid. While the Honda accord hybrid and Honda Cr-v hybrid share the same fuel injection system as part of Honda’s two-motor hybrid-electric powertrain, the Honda Cr-v hybrid has not yet been included in this recall. Nonetheless, many Honda Cr-v hybrid owners are experiencing similar issues and are incurring repair costs out of pocket.   Honda, please consider including our Honda Cr-v hybrid in your recall for your fuel injection system issue.  including all within the 10 yr 150k miles that are using this faulty fuel injection systems.

2017 Honda cr v- hybrid all warning lights on the dashboard—including the check engine light, oil pressure warning, battery warning light, tire pressure monitoring system (tpms) light, brake system warning, abs (anti-lock braking system) light, fuel level warning light, and engine temperature warning light—activated intermittently. This issue intermittently occurred each time the vehicle was started, with symptoms lasting from a few days up to several weeks. The warning lights would temporarily resolve, with periods lasting from a few days to several months. The vehicle's battery was replaced twice within one year, which seemed to temporarily alleviate the issue; however, the warning lights recurred afterward. Recently, Honda conducted a thorough diagnosis and identified the root cause, leading to the replacement of the spark plugs and fuel injectors at an approximate cost of $2,000. If unaddressed, this issue could pose safety risks such as rough idling, decreased fuel efficiency, engine misfires, difficulty starting, poor acceleration, unexpected stalling, complete loss of power, and electrical problems. This issue is recognized by Honda and is currently covered under a recall for the 2023-2025 Honda pilot and the 2023-2025 Honda accord hybrid. While the Honda accord hybrid and Honda Cr-v hybrid share the same fuel injection system as part of Honda’s two-motor hybrid-electric powertrain, the Honda Cr-v hybrid has not yet been included in this recall. Nonetheless, many Honda Cr-v hybrid owners are experiencing similar issues and are incurring repair costs out of pocket. Honda, please consider including our Honda Cr-v hybrid in your recall for your fuel injection system issue.

All warnings on dash appeared on vehicle. Took to the dealership and all 4 cylinder fuel injectors need replacing. Car only has 39,900 miles on it.

A 2017 Cr-v entering limp mode and showing all dashboard alerts. I brought it up to Honda America and open case #15734548 to complained about fuel injector recall. After reading the codes at local Honda dealership chandler,arizona and repaired cylinder misfire issues. Two days later again started showing all warning lights. I request local Honda dealer to diagnosis further. After discussion with dealer and started reading countless posts regarding bad fuel injectors on different models. I too see Honda recalls for fuel injectors and my VIN is not in recall list. Its well maintained and only 73k miles on this 2017 crv. They wouldn’t normal maintenance issue and its a design or manufacturing flaw. I am requesting that Honda cover the full cost of the necessary repairs and more move its several safety recalls due to bad fuel injector design or so. Should be included in recalls.

I am writing to formally express my extreme dissatisfaction with the randomly vanishing dashboard, all sorts of warning lights and its recurring issues. I see a recall for 2017 crv for fuel injector. I don't see my VIN for fuel injector recalls and most likely my crv issue with fuel injector. Fuel injector replacement is a major repair. I. I scheduled an appointment with autonation Honda chandler,az,to troubleshoot an issue. I believe these issues may stem from a design or manufacturing flaw. I am requesting that Honda cover the full cost of the necessary repairs.

2017 Honda crv only serviced at Honda dealers and all recommended maintenance performed including cleaning the fuel injectors at 50k! engine was running rough and took it to dealer. Tech found vehicle running very rich, with some slight misfires. Pulled plugs, no cooling system leak, every cylinder running rich, fuel injectors are sticking (cleaned one year ago), spark plugs are heavily fouled. Had to replace all fuel injectors, and all spark plugs at 56k miles. Called Honda because this is a known 2017-18 software problem causing the fuel to run rich "Honda service bulletin 19-032" June 18, 2019 and Honda claimed my vehicle was not included in the extended 6yr unlimited miles warranty because I took it in for service before it through the required codes. So because I take good care of my car and pay more for Honda dealers to do the maintenance so my warrenty won't be voided I get screwed by Honda out of $2300!! NHTSA knows this is a true saftey issue. The recorded complaints are massive for this fuel issue. It is a software issue that should have been updated on all the 2017-2018 Honda crv's to avoid premature replacement of the fuel injectors. Honda has all my vehicle records in their system but couldn't confirm the dealer did the required software updates which the tbs specifically says if the software update is not done it voids the warranty. Nhtsa needs to make Honda make a recall and reimburse for all these fuel injectors and spark plugs. Honda also didn't have any loyalty for this being our 5th Honda. I have read this issue can cause a vehicle to stall if not fixed which is a safety issue.

Fuel smell when vehicle is parked overnight. The smell is inside the cabin especially stronger near the rear left passenger door where the filler fuel is located. This has been happening even in summer temperatures, not just cold weather like some people have mentioned in forums or online.

My 2017 Honda Cr-v experienced premature and sudden fuel injector failure that I believe is part of a widespread defect affecting 2017–2019 Cr-v models. In April, multiple warning lights came on several times (“10-point” dashboard lights). I went to different mechanics, and one recommended a brake fluid flush, which I completed. The warnings continued. Later, while driving, I heard a sudden, harsh crunching sound from the engine area. I immediately pulled over out of concern for safety. The vehicle still moved but did not feel safe to drive, so I cautiously limped it home and canceled clients. I took the vehicle to south point Honda in durham, nc. Their diagnosis confirmed that all four fuel injectors had failed, and they quoted $1,679. 99. I then had the repair completed at a Honda/Acura specialty shop for $1,273. 12. Fuel injectors are not a regular maintenance item, and many other Cr-v owners have reported the same problem. These injector failures can cause misfires, loss of power, or engine damage while driving, which is a safety concern. I am requesting that NHTSA investigate premature injector failure in 2017–2019 Honda Cr-v models.

Unexpected sudden acceleration. 2017 Honda Cr-v. Twice while highway driving with autopilot on, system failed to slow it when approaching other vehicles and it sped up instead. When I pumped the brakes, it went away. I took it off autopilot henceforth. Several days later, coming out of a market parking lot and approaching a stop sign, the accelerator went down and sped me forward with brakes doing barely anything. I shot into a cvs parking lot, managed to stop it and turn the engine off. It's sitting in a garage now and no one knows what to do and I am terrified to drive it. Could have killed me or others around me. It was not the floor mat nor anything I did.

This complaint is in regards to three engine failures for my vehicle. I purchased the vehicle in October of 2017. In October 2020 this vehicle suffered a malfunction of the fuel injector systems. Warning lights were enabled prior to losing full power of the vehicle at this time and it was brought in for repair. In June 2025, my vehicle began losing power while actively driving resulting in the car and myself being put in potentially dangerous conditions on the road. The car would fail to accelerate and move. The car had to be coasted back to an area of safety. There were no warning lights prior to this happening. Warning lights came on hours later after attempting to address the issue. At that time in June 2025, my car was found to have a blown head gasket from an unknown cause per the dealership. I was without a car for approximately 3 weeks which was devastating for my family and caused hardship. As well as a financial burden from the costly repairs. In September 2025, my car again lost power and was required to be towed to the dealership. At this time I was told again that the fuel injectors needed replaced due to failure. Warning lights did not display prior to the power failure, they displayed after the fact as we attempted to find a cause at the scene. This was a sudden power failure that could have been potentially dangerous.

The high-pressure and low-pressure fuel pump malfunctioned and no, it is not available for inspection upon request. The car all of a sudden got stalling while running at 45 mph and got jerking continuously. After the incident, the car was taken to a dealer for a diagnosis and the dealer inspected that the high-pressure and low-pressure fuel pump got malfunctioned. There were no warning lamps, messages or other symptoms of the problem prior to the failure and they first appeared when the incident occured.

This car has some fuel injector problems. I've replaced them and it's still running very crappy. I've read a lot and seen a lot of people getting their fuel injectors fixed with this year of vehicle and now it smells like it's flooding out and Honda should be covering this. This has been an ongoing issue. I've tried to fix it. It's not working. This is car is a lemon.

My cruise control will not work. Lane departure is not working. All my lights are on in my new vehicle I just purchased. Bad fuel injectors seem to be the problem. Honda should recall these bad fuel injectors before a serious accident occurs.

All auxiliary safety system warning lights came on at once, with abs, tpms, collision avoidance and adaptive cruise all rendered inoperable. Dealer says faulty fuel injectors are to blame. . Read more...

All lights on dash coming on. Codes p0172 and p0303 pop up on obd scanner. Mafs , spark plugs, ignition coils and air filters all replaced. Car goes into limp mode. 124,800 miles. Dealer says fuel injectors failed and needs replacing, research shows this is a common issue for the. 2017 crv Honda edition. Mpg never dropped , remained. 33. 1. When codes cleared, car functions like normal.

Cylinder 2 and cylinder 3 misfire code, rough idling, loss of power specific problems: rough idling: the engine may feel shaky or unstable when the vehicle is stopped or idling, often due to incomplete combustion in one or more cylinders hesitation or lack of power: you may notice your Cr-v hesitating or losing power during acceleration, or a general reduction in performance, making it feel sluggish or difficult to drive stalling: the engine may stall unexpectedly, especially at low speeds or when stopped, as a result of misfires disrupting normal engine operation check engine light: the check engine light may come on or begin flashing, indicating that the vehicle’s onboard diagnostics have detected repeated misfires vibration or shaking: you might feel abnormal vibrations through the steering wheel, seat, or floor, especially while idling unusual noises: listen for popping, sputtering, or knocking sounds from the engine, which can indicate incomplete combustion or irregular firing poor acceleration or loss of power: you might notice reduced engine responsiveness, sluggish acceleration, or the inability to reach higher speeds easily erratic rpm needle: the tachometer may fluctuate unpredictably due to inconsistent engine speed and combustion smoke from the exhaust: excessively rich mixtures from leaking injectors can result in black smoke coming from the exhaust pipe difficulty starting or no start: the engine may struggle to start or fail to start if enough fuel isn’t being delivered to one or more cylinders.