Catalytic Convertor Problems of Chevrolet Impala

Tl the contact owns a 2001 Chevrolet Impala. The contact stated that the check engine indicator illuminated while driving 45 mph and the "service engine soon" message appeared. The check engine indicator remained illuminated for a couple of weeks. The contact saw a service bulletin online regarding the catalytic converter. The vehicle was not diagnosed or repaired. The dealer was not contacted. The contact called the manufacturer and was advised to file a complaint with NHTSA. The failure mileage was 150,000.

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2003 Chevrolet Impala. Consumer writes in regards to trac unit repair and reimbursement. * ld the consumer stated when the traction light illuminated, the vehicle stalled. The vehicle was towed to the dealer. They discovered the lower intake gasket was leaking, and replaced it. The consumer drove five miles, after leaving the dealer, and the traction light illuminated again, and the vehicle stalled. Also, the ignition switch and catalytic converter were replaced.

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The contact owns a 2014 Chevrolet Impala. While driving various speeds, the brakes locked up. The contact stated that the engine blew out, which also caused the catalytic converter to fail. The contact stated that the dealer could not determine why the vehicle overheated. When the vehicle overheated, the contact became locked inside the vehicle until it cooled down. In addition, the high beam headlights were very dim and dimmer than the daytime running lights. The vehicle was taken to the dealer where it was diagnosed that the vehicle was designed in that manner. The vehicle was repaired several times for the failures, but the remedies failed to repair the vehicle. The manufacturer was notified of the failures. The approximate failure mileage was 54.

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The contact owns a 2001 Chevrolet Impala. While driving between 60-65 mph, the vehicle decelerated and would not drive over 30-35 mph. The rpm's appeared to be normal. The contact took the vehicle to a repair shop and a mechanic replaced the oxygen sensor and filter, but that did not correct the failure. The mechanic stated that the catalytic converter failed. The current and failure mileages were 128,000.

The contact owns a 2003 Chevrolet Impala. While driving at various speeds, the vehicle would stall. The dealer made repairs to the catalytic converter, however following repairs the vehicle experienced the same failure. The vehicle was taken to an independent mechanic where the mass air flow sensor was replaced. The repair did not correct the failure. The vehicle was taken to another dealer and the catalytic convertor was repaired a second time. The dealer also advised replacing the sensor but the contact had recently had the sensor replaced. The vehicle continued to stall. The vehicle was taken to a second independent mechanic where the fuel pump was replaced but still, did not correct the failure. The vehicle was left in the possession of the dealer where repairs were made to the electrical system. The failure mileage was 61,500.

I own a Chevrolet, Impala - 2002. In the beginning of April I was on my way to work and when I attempted to pull out into a busy four-lane highway as I hit the gas pedal to accelerate the car felt sluggish as though it were not getting enough gas or not shifting into gear. That evening I stooped to fill up the gas tank and upon leaving I was climbing a hill and the car acted up again and made a different sound and again acted as though it were not shifting into gear or not getting enough fuel and the security light (not service engine) came on and stayed on. I immediately phoned my husband and he made arrangements to take it to the dealership (john serretti). We have maintained this vehicle faithfully since we purchased it oil changes, tires rotated etc. All performed at john seretti's every 3/4 months. After reviewing all paperwork received at home for the Impala my husband came across a letter from general motors mailed in October 2005 stating that some vehicles were experiencing loss of power due to the catalytic converter and if we did indeed have any issues with this to take to the dealer and they would replace it, but if not, nothing needed to be done and this letter was not a recall. The dealer performed a diagnostic test ($90) and found that indeed the catalytic converted was clogged and supposedly caused the spark plugs wire to arc and melt which all had to be replaced at our expense (almost $600). My husband has talked to several mechanics in reference to this and they all agree this could have been a potentially dangerous situation possibly causing the vehicle to catch on fire. Gm did cover part of the repairs but in my opinion they should have covered them all because the converter was defective and if carbon had built up to that extent to cause all of this damage and leading me and other mechanics to believe it could very well have started a fire, why wasn't it discovered at the previous inspection-oil change?.

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In January 2006 my 2002 Impala loss power. I was going up a very small hill and I didn't think I was going to make it up. I took my car to my local mom and pop's garage and they put it on the computer. It showed that the catalytic converter was bad eventhough the check engine light did not come on. I had them replace not knowing that the car was still under warranty for emissions and they didn't use a gm part. A few months later, the check engine light did come on. Again it showed the catalytic converter as the problem. The service technician said he had never had any problems with putting a non-dealer part on a car before but did replace the converter once again with a non-gm part in case the first one happened to be a bad part. A couple of months later the check engine light is back on. Took it to the dealership and the catalytic converter shows as well as the transmission. Of course, they wouldn't make good on the catalytic converter by this time because it was out of warranty and it wasn't the original gm part. I was told that it would cost $775 just for them to look at the transmission. I cannot afford this and just brought the car home. I'm still driving it but it's worse and worse every day. I wouldn't trust driving this car very far. I've read many complaints on the catalytic converter & the transmission that you would think gm would have to step up and do something. At this point I would never purchase another gm vehicle and my husband is diehard gm. I've taken very good care of this car hoping that it would last until my daughter starts driving and I could hand it trustingly down to her but that's not going to be the case. My husband doesn't take care of his trucks like I would and he still has a 1995 that runs good.

The catalytic converter failed and was covered by a gm special policy. Due to the failed catalytic converter the upper intake manifold also failed resulting in an expensive repair bill. Gm would not cover the cost of the upper intake manifold even though it failed from a known issue. The repair bill states, "upper intake manifold failure due to catalytic converter failure. ".

Mis-diagnosis and willful negligence vehicle was brought in for diagnosis of engine knocking and loss of power upon acceleration at highway speeds. Dealership diagnosed a clogged catalytic converter, however, the symptoms returned within 15 days. Now the dealership says that the engine is damaged and must be replaced at a cost of $5,000. The vehicle was only purchased 6 weeks ago at a cost of $12,000. The first repair was made under warranty, however, now the vehicle is beyond warranty.

2002 Chevrolet Impala, 72k miles, poor acceleration, over-heating of catalytic converter. Fire is possible. No announced recall, however a service recall was issued and warranty extended due to faulty converter. Dealership will not announce recall, unless a problem occurs.

Failure of the catalytic converter on a 2003 chevy Impala 3. 4. L.

I have a 2001 chevy Impala it has a completely clogged catalytic converter according to my mechanic. I contacted country chevy in warwick NY they cant help me w/o charging me because the warranty expired 1800 miles ago. I understand from there serv dept as well as numerous mechanics this is a big problem. The vehicle has no warning light for this or I may have know prior to warranty expiring. Now I have a car I paid cash for that I cant drive. I was wondering if there have been any prior complaints. I am contacting gm to see if they can assist me further.

On 6/29/05 I was driving down the road and loss power. The car would only go a few miles per hour. It was hesitating upon take off. I drove it home and called a tow truck. It was picked up and taken to a repair shop. I was told that I needed a catalytic converter. I paid to have a catalytic converter and all parts replaced.

Engine started to spit and sputter. It got worse. Caller changed fuel filter because the dealer said it might be the problem. While driving the vehicle the car ran fast and tried to take off, and she had to slam the brakes hard, and hold them to t stop car. Dealer said a hole was burned into the manifold, and when they did a diagnostic test, they said a misfire code came up. Problem was with catalytic converter being plugged. Dealer fixed the burned intake manifold before they found that the problem was catalytic converter. That was the only thing wrong with it.

The contact received a letter, but this was not a recall letter. The letter stated the catalytic converter was being replaced due to the end cone insulation breaking away and blocking the front of the first catalytic converter, and preventing the free flow of the gas. This vehicle was not included because it was over the mileage limit. The vehicle has been taken to 2 separate transmission mechanics and they told him it was the catalytic converter, and not transmission.

Catalytic converter clogged on 2002 vehicle. The engine was calibrated to run too lean making the exhaust gases too hot, leading to premature failure. Noticed gradual power loss since 50,000 miles but thought it was air filter. Engine light still did turn on. Took in for service and was told it was ok for warranty.

While driving at 45 mph vehicle suddenly accelerated. Consumer was able to control the vehicle and pulled over. Drove vehicle to the dealer for analysis. The mechanic noticed that the catalytic converter was clogged. This problem caused the catalytic converter to be replaced.

Catalytic converter clogged on 2002 vehicle. The engine was calibrated to run too lean making the exhaust gases too hot, leading to premature failure. Noticed gradual power loss since 60,000 miles but thought it was air filter. Finally, I could not get up to highway speeds at 85,000 miles, but the engine light still did not turn on. Took in for service and was told it was out of warranty.

My vehicle was towed to the dealership on 10 April,2003, the catalytic converter/ exhaust system had to be replaced, my car doesn't even have 47,000 miles on it and it is just barely 2 years old???? the engine lost all power, the parts were replaced, the transmission was flushed, but. . . . The vehicle still doesn't have the power that it should have and the transmission is not shifting like it should, now I was told that when the catalytic converter went that it sent pieces though the lines in the car, I did ask the dealer if this would be cause a problem with the engine or the transmission and the response was (it shouldn't) now this does sound like a problem to me. . . . I would like someone to look into this matter and give me a real answer on this problem. . . The problem that this vehicle had is kind of unheard of in the early stage of mileage and age. . The dealership was even confused on the problem, all computers that the car was placed on by different shops should nothing was wrong with the car, until it was put on a flat bed and taken to the dealer. . . . I would appreciate any help you can give me in this matter. . . .

2001 Chevrolet Impala with severe engine problems. Consumer states that a valve that was touching the engine melted. The melting of the valve caused burning to the fuel lines, electrical lines, vacuum lines, and protective coverings. The consumer stated the problem was with the catalytic converter.

On slight grade when stopped at a traffic light or stop sign, vehicle will roll back when taking foot off brake and will hestitate when you accelerrate. At times from a stand still, vehicle will stumble when trying to get in fast traffic. Second try vehicle will stumble and then quickly accelerrate. Vehicles hestitates at slow speeds, 5 to 25. Speeds at 5 to 40, less than 40, vehicle will feel to buck when going up hills or minor grades. When this happens, there is a smell of rotten eggs.

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