Which parts fail
Components named in complaints (fuel pump, injectors, fuel tank, hybrid and EV propulsion).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2007 Chevrolet Impala owners, lightly cleaned up (personal details are redacted by NHTSA).
I recently purchased a 2007 Chevy Impala, 3 weeks after purchase while on the highway, the car suddenly slowed down to a crawl, a reduced engine light came on the dash, being as we were on the highway to suddenly only being able to go 20mph was very frightening!! I was able to get the car to the side and had to have it towed home. After searching this issue online I found thousands of complaints from people with the same issue with this same car. I find it strange there was not a recall for this due to it being a serious safety issue. After calling a Chevy dealer, they told me all they could do is hook it up for diagnostic tests but it would cost 175.00 just to do that. This vehicle is still parked and we are unable to drive it and still have no idea what's wrong with it. …
Had issues with my 2007 Impala 3.9l stalling and reducing power on my wife, and at times almost leaving her in or on the road. I have replaced the throttle body, throttle peddle ( twice ) and had the car flashed at the local GM dealer. Now the car not only reads reduced engine power it read starting disabled service throttle and died while she was driving down a busy highway during rush hour.. Causing her to almost be involved in a bad wreck. This seriously needs to have attention of whoever at GM is over safety, cause this issue will end up in a really bad situation if or when someone ends up seriously hurt or killed. I mean you really need to program them to slowly reduce power, not just tell you then shut off completely and have the driver fight and panic to get off the road through traffic, while not getting run over in the process. But if there is a fix we need to know.
Reduced engine power/ traction control warning/ gas line fuel leak. This car flashed a reduced engine power message while I was going 65 MPH straight away on busy city (in houston) freeway and the traction control warning light came on. My car then immediately reduced speed and would not go beyond 40 MPH. I was told that the gas line fuel leak has nothing to do with it but it seems very coincidental that this all happened in the same day. GM is putting out a lot of trashy vehicles right now and this should definitely be a recall; especially when there are numerous valid complaints of the same issue. I'll never by GM/Chevy again. I am going back to an imported brand
My wife's 2007 Chevy Impala left her stranded on the side of a busy highway in a snowstorm. She was driving at highway speeds when all of a sudden, her overheat warning light began flashing, and what she described as "a huge cloud of fog or smoke" was trailing behind her. She immediately put on her hazards and pulled off to the side of the road. Once stopped, the digital readout showed "engine overheat, idle engine" and then the engine shut off. The vehicle is at a dealer awaiting diagnosis.
"Takata recall" while on the highway traction alert came on the message states the engine is slowing down and took it to o'reily's and states the sensor codes alerts that will cause my car to fail by shutting down and locking up if its not corrected and to see if there is any recalls on this malfunction
I have experienced many issues with my car. Shuts off when stopped/brake. Cranks right back up. Reduced engine power car has shut down starter disabled. Low oil pressure light comes on and stays on. Traction control light comes on.
Driving on highway check engine light came on reduced power light came on, few seconds later engine stalled. Pulled to side of road, called on star svc advisor performed onboard diagnostic test, results indicated failure in throttle system/traction control system. Advisor attempted field repair cycling ignition switch 3 times and I attempted to start engine. It would not start. Burning smell coming from vehicle, opened hood- air box smoking. Informed on star I am disconnecting battery. On star advisor call on my cell phone, and told me tow truck was coming. While awaiting tow truck smoke became more intense from air filter. Opened the air box and found mass air flow center burning. Removed air filter and discounted duct work to prevent fire from spreading. Vehicle was towed to local dealership. Service dept. Was closed and salesman open shop to allow car to be stored inside. …
First, when I slow down to turn a corner, I take my foot off the gas. After the turn, when I press the gas I have no power. It doesn't die, it just won't go anywhere for about 15-20 seconds, no power. That doesn't sound like a long time unless you are sitting in the middle of a busy intersection. I have to come to a complete stop for about 20-30 seconds, then take off. Sometimes it goes, but feels like it jerks into gear. That's OK at stop signs but stop lights that turn green as I approach can be dangerous. Also, if I turn a corner onto another street, it hesitates. And sometimes I have almost been hit from behind. People expect you to turn and proceed. When you just stop, they May not. I also noticed one day, when I just coast on a level road, my car sometimes accelerates for quite a while, instead of slowing down immediately. …
While driving car started to jerk and hesitate the check engine light came on along with a message of reduced engine power. Could not drive the drive over 5 MPH. Was able to get to the side of the road. Had to push the car into a parking lot as the engine will no longer start but cranks over fine. Had to buy a scanner to read the code because the car was not able to drive to a auto repair shop or auto parts store to read the codes. The po641 code was set. Checked and tested the sensor wires for the 5volts every one that I tested showed OK. Replaced the gas pedal assemble because of the code that could be a source of the problem no difference. Cleaned the throttle body unit no change car will not start.checked and gave all the wires a good pull and or tug to wiggle the connectors and took apart all sensor connections no corrosion was found.all grounds appear to be good. …
Engine power was reduced while I was traveling with the flow of traffic. I attempted to accelerate but car started slowing down. Took the vehicle for repair and replaced the pedal position sensor was replaced. I contacted Chevy dealership service dept and was told it's a common occurrence. Impalas have a throttle sensor instead of cable. If the sensor goes out, the engine power is reduced to protect the engine integrity. In some cases, it's reduced significantly. The manufacture noted my concern but the rep would not escalate the matter. I went online to file a complaint and there is a Chevy forum with similar concerns. General motor reps reply with common responses to take the vehicle to an authorized mechanic and their concern has been noted. I was informed by representative at 800# for manufacture to call back if it happens again. …
Related recalls
Fuel system, gasoline › Storage
On certain vehicles, the fuel tank is missing the adhesive layer that bonds the barrier layer to the outer shell of the fuel tank.
Remedy: Dealers will inspect the serial number on the fuel tank and replace the fuel tank if necessary. The recall began on November 13, 2006.
Fuel System complaints in other Impala years
Frequently asked questions
How common are fuel system problems on the 2007 Chevrolet Impala?
NHTSA has 23 complaints about the fuel & propulsion system of the 2007 Chevrolet Impala, 4% of the model year's 627 complaints. The component named most often is fuel injection system (1 mentions).
Is there a recall for 2007 Chevrolet Impala fuel system problems?
Yes — NHTSA recall 06V-419 (storage, Oct 31, 2006). Recall repairs are free at authorized dealers.
At what mileage do 2007 Chevrolet Impala fuel system problems start?
Half of the complaints with a recorded mileage happened before about 86,000 miles, and 17% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 1 fire and 0 injuries to fuel & propulsion system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.