Car Will Not Start problems of the 2007 Chevrolet Impala

The contact owns a 2007 Chevrolet Impala. On several occasions, while driving various speeds, the vehicle stalled. The contact stated that the failure recurred several times. On numerous occasions, the vehicle failed to start. The dealer diagnosed that there was an electrical system failure and also the throttle body needed to be serviced. The vehicle was repaired on three separate occasions, but the failure recurred. The vehicle was included in NHTSA campaign number: 14v355000 (electrical system). The manufacturer was not notified of the failure. The approximate failure mileage was 112,000.

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. No broken wires are found no blown fuses were found. After 2 days was able to start engine with the message reduced engine power and car died again and would restart but not idle. Was able to rev engine and keep it running but once it idled it would die and sometimes not restart again. At this time car is unsafe to operate on any roadway because it might die and random times.

The first instance I was driving and the "service brake system" flashed on the display. I had all brake pads replaced at dealer on 1/3/2013. 2/7/2013 I was in traffic and the car suddenly slows to about 10 mph and would not accelerate the dash then displayed "reduced engine power" and the check engine light came on. On 2/14/2013, I had the throttle positioning sensor replaced and at the same time had the rear defrost wiring repaired because that had not been working for over a year. On 3/4/2013 the car would not start by the factory remote start, so went out and started the car with the key, when I returned to the car the vehicle would not start at all the chime would sound the lights on the dash flashed but no start. I waited a few minutes then tried again, the car started briefly (50 seconds) "reduced engine power" appeared on the dash then it shut down completely. I looked under the hood saw the battery attachment was loose, tightened that up and then the car started up. However, the car radio (factory radio never replaced), the chime, or the ticking of the turning signals no longer work. I have an appointment with dealer on 3/14/13, but the car seems to be failing all around. In reading chevy/gm forums, there are thousands of chevy owners experiencing these same issues, chevy/gm needs to take ownership and investigate these vehicles to determine the root cause of the problems. Nearly 3000 dollars later in dealer repairs is not getting to the bottom of the issue. I was nearly in a crash due to the reduced engine power issue and that was scary enough to make me not want to drive this car or an at all.

The contact owns a 2007 Chevrolet Impala. The contact stated the vehicle would not start and the failure occurred intermittently after driving the vehicle. The contact stated the vehicle would often take up to one or two hours before it would start. The vehicle was taken to a dealer and an independent mechanic where the technicians were unable to diagnose the failure. The vehicle was not repaired. The approximate failure mileage was 75,000.

Tl-the contact owns a 2007 Chevrolet Impala. The contact stated that the vehicle failed to start on the first attempt and would hear an abnormal noise. The contact would have to try several attempts before the vehicle would start. The dealer diagnosed that the ignition switch needed to be replaced. The vehicle had not been repaired. The vehicle was included in NHTSA recall repairs done under NHTSA campaign number: 14v355000 (electrical system) . The manufacturer was not notified of the failure. The failure mileage was unavailable. Ne.