Speed Sensor Problems of Infiniti Q50

Output speed sensor on 2016 Infiniti Q50t - took vehicle in for oil and filter change 2 days ago. I drove the car about 40 miles, without incident. Went back to same place for state inspection yesterday. I drove about 2 miles from the inspection place and park in shopping lot. Went in business to shop for about 30 minutes. Returned to vehicle and drove about 100 yards through the parking lot. The car appeared to lose power and made a jerking movement as if it didn't want to go. I drove out onto a very busy street and we were almost rear ended by other traffic. I pulled up in another parking lot to assess the problem. I could not determine what was causing the car not to pick up speed. I drove to an autozone: battery checked out at 90 percent good; no electrical problems noted either. I drove off about 1 block from autozone: the cel came on for the first time. I went back to the autozone to get them to check it out. The diagnosis code is p0720: vehicle speed sensor. I went back to the inspection shop the next day and I was told the same code. I took the vehicle to the dealership and I was told that I need to replace the whole transmission. I purchased the vehicle about 8-1/2 years ago; garage kept; only put 60k miles on car since purchase. Car has approx. 108k miles now. This is not only a problem with 2014 -2015. When I purchased the car in 2018, I feel like the dealership should have informed me that this was a problem with Q50s. This is not just an issue with previous years; this is a problem with 2016 as well. This vehicle is very clean/outstanding: no accidents, no body damage, immaculate leather seats, no repairs in 8-1/2 years and all of a sudden this fault code comes up with no previous indication that the transmission was not working properly. There needs to be a recall for this vehicle due to this common issue.

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Tl the contact owns a 2015 Infiniti Q50. The contact stated while driving approximately 70 mph, the vehicle jerked, shifted gears, reduced speed, the odometer flashed, the check engine warning light illuminated, and the heating and air conditioning system went from cold to hot. The contact got off the nearest exit and pulled over and waited a while before continuing to drive home to park the vehicle. The contact stated that a diagnostic code reader retrieved dtc code: p0720 (output speed sensor). The contact contacted Infiniti of tampa (4600 n dale mabry hwy, tampa, FL 33614; (813) 694-1579) and was informed that the camshaft needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the issue. The approximate failure mileage was 65,000.

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Was driving my Infiniti Q50 on a normal dry day when all of a sudden it down shifted or felt like I was driving a standard model vs automatic. . . I pull over my engine light comes on. . I turned off all sensors associated with the intellitouch system thinking it was not judging the distance correctly between cars because it will automatically slow your car down. . . Continued driving and I'm noticing as I try to accelerate my car is not shifting into 3rd gear. . . So I get to about 35-40 mph and now I can tell it's revving in the same gear. . Get home google the issue and it seems the valve body on the 2015 Q50 has a thread. . . Go to youtube this guy has a video about him being told it's the speed sensors. . . But when he went for repair Infiniti informs him the valve body needs replacing. I took my car into an Infiniti dealer , spent $180 to have a diagnostic run and was told their is a service bulletin for the speed sensors that they should just replace the valve body. The valve body is $1635 and on a national back order as of August 2020 when I'm experiencing this issue. . Called Infiniti consumer affairs and I'm told well unless you pay for the part we can't do anything to get it expedited. . . It's been 45 days. . . So I have to tie up $1700 and don't know when this part may be available. . Can't drive car because I'll burn my transmission up. . . The valve body in 2015 Q50's need to be recalled. . . I could have been on the freeway or driving to or from louisiana from houston. . Luckily I was within 15 miles of my home. . Called the other 2 Infiniti dealers in houston none of them have it in stock and have at least 1 Q50 waiting for repair. . Called the dealer in austin also no stock with 2 valve bodies on reserve. . . I have 106000 miles on my Q50 and it's no longer under warranty. . This issue has been reported at fewer miles like 30k-50k so has nothing to do with the age of the car.

Engine and/or transmission lost torque power. Since 2016 while car only had 11,000 miles all of the sudden car lost torque power while accelerating. Check engine indicator has never light up and dealer consult scanner has never found the issue. Still car doesnt have same acceleration nor torque while going 0-60mph. Already I've seen so far 4 cars of the same year with speed sensor problems and replacement. Mechanics say it begins by loosing power until stops working and car wont move.