2008 Pontiac Grand Prix engine NHTSA complaints: Vehicle Speed Control

NHTSA — Vehicle Speed Control Problems


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
94,709 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2008 Pontiac Grand Prix engine problems

engine problem

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2008 Pontiac Grand Prix Owner Comments

problem #8

May 232015

Grand Prix

  • 82,973 miles


The contact owns a 2008 Pontiac Grand Prix. The contact stated that while driving at approximately 60 mph, the vehicle speed decreased to 30 mph. The "reduced engine" warning light illuminated. The vehicle was taken to a dealer, who diagnosed that the accelerator pedal needed to be replaced. The failure recurred on another occasions and the vehicle was towed to a dealer, who replaced the throttle plate but the failure persisted. The failure mileage was 82,973.

- Buffalo, NY, USA

problem #7

Sep 022015

Grand Prix

  • 94,000 miles
The contact owns a 2008 Pontiac Grand Prix. While driving at 45 mph, the vehicle failed to accelerate while the accelerator pedal was depressed and the reduce engine power warning message illuminated on the instrument panel. The failure was persistent. The contact also stated that the engine stalled. The vehicle was able to restart. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 94,000. Updated 02/05/16

- Detroit, MI, USA

problem #6

Jun 012012

Grand Prix

  • 120,000 miles
Reduced engine light keep coming on while driving and the vehicle lose power when try to accelerate. This has been going on for about 3 years now on and off. We have brought the vehicle to get repaired multiple times and the problem continues. The throttle body has been changed and also sensors but the problem continues.

- The Woodlands, TX, USA

problem #5

Aug 212015

Grand Prix

  • 133,700 miles


My Grand Prix recently started to display a message stating reduced engine power. It has been happening randomly for the past week. It only happens as I am driving the car. The car slows dramatically, and does not accelerate at all. As I was driving yesterday, I was merging into traffic where the speed limit is 45 mph, I had more than enough room to merge into traffic, the reduced engine power message displayed and the car would not accelerate. The traffic quickly caught up to me and I was almost hit due to the car not accelerating. I am curious after looking into this matter and finding so many complaints about the same issue, how many complaints need to be filed, or how many deaths need to occur before something is done? I am now scared to drive my own car.

- Madison Heights, MI, USA

problem #4

Jun 092014

Grand Prix

  • 105,000 miles
Driving on the highway or anywhere, it happens every other day. The information message center chimes then the check engine light comes on the car slows down to 25mph. When I am on the highway this is very dangerous. I have taken it to 3 different service stations, the last 2 dealerships. All the codes are throttle related and I get the car back after a week or 2 and the same thing happens again. No one can fix it. I have emailed GM they did not respond to my email. I attached all the service records with the email hoping they would be able to help. Slowing me from 70mph down to 25mph on the highway (US131) will cause an accident sooner not later. Its only a matter of time before this happens. GM doesn't seem to care. I'm not sure what to do, no one can fix the car and I'm running out of money for repairs.

- Kentwood , MI, USA

problem #3

Mar 012014

Grand Prix 6-cyl

  • 92,000 miles
I was driving on the highway and exiting on a ramp. The ramp was on an incline. My driving speed around 45 mph. Then, unexpectedly, the speed decreased to 30 mph and immediately the "reduce engine speed" light came on. Shortly after, my "check engine" light came on. I continued on my exit, pulled over and parked. After car being off for 30 minutes, the car started right back up. The "reduce engine speed" light went off but the "check engine" light remained. I purchased my car in Feb 2014 and this was the very 1st incident. In the beginning, this wasn't frequent but as I noticed it happening more often, I began to record each time this happened. The dates I have tracked thus far are 7/7/14, 7/10/14, 7/13/14, 7/27/14, 8/2/14, 8/11/14, 8/12/14, 8/20/14, 8/21/14, 8/22/14, 8/28/14 (happened 3 times throughout the noon at 2:15P, 3:00P & 5:20P), 8/29/14, 9/9/14, 9/10/14 (4 times throughout this day), 9/15/14, 9/16/14, 9/17/14, 9/18/14, 9/19/14, 9/20/14, 9/23/14, 9/24/14, 9/27/14. I have already had $550 repairs done, at least that's what I thought, to take care of the "reduce engine speed" light but it continues to come on. I took it back the same mechanic/body shop and the diagnostic machine showed more/different codes. New repairs would cost another $550-$600. Also, when either of my sons sit in the front seat, the passenger airbag light goes on and off. They are both between 90-95 lbs. This are major concerns because I need to know that we are safe whenever we are inside the vehicle.

- Dallas, TX, USA

problem #2

Mar 312014

Grand Prix

  • 107,000 miles
The contact owns a 2008 Pontiac Grand Prix. The contact stated that while driving 60 mph, the vehicle stalled. The contact mentioned that the reduced engine, stability and traction control warning lights illuminated. The vehicle was taken to a dealer where it was diagnosed that water penetrated inside the instrument panel, causing the electrical system to fail. The technician sealed the area but the failure recurred. The vehicle was taken back to the dealer where it was diagnosed that the water damage caused the accelerator pedal to fail and needed to be replaced. The vehicle was not repaired. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 107,000 and the current mileage was 111,800.

- Milaca , MN, USA

problem #1

Dec 012011

Grand Prix

  • 23,000 miles
Bought this vehicle pre certified with warranty with 22000 miles. Within 4 months the power steering line breaks replaced under warranty. Brake sensor replaced under warranty front left tie rod replaced under warranty. These are problems that occurred within a 9 month timespan. During this time you could press on the gas and the vehicle would hesitate/stall/shake and times lunge forward as you try to ease forward. This occurred the entire time I had the vehicle and they were unable to duplicate the problem when it was under the warranty. Driving home the stability/traction control sensor lights came on, them reduced engine power came on and the car would not drive over 15 miles. Now at 34000 miles and a indicator light showing they figured it was the sensor on the gas pedal ($360). Oh forgot to mention dealership also stated during that warranty timeframe unless something breaks or a indicator light comes on there is nothing they can do. After that they found I also need a front right outer tie rod ($285). Contacted GM because I think they should have paid for the gas pedal. To make a long short short it's being evaluated and since I didn't want to leave my car there another night or perhaps over the weekend until they confirmed with the sales manager reimbursement may not be possible. ## VIN failed ##

- Reynoldsburg, OH, USA

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