I have had several issues recently with my 2005 Grand Prix GTP. I was forced to stopped short and shortly thereafter my check engine light came on. I brought it to the dealer and was told codes were thrown for brake switch and catalytic converter. Before I was able to have either possible problem resolved, the "Charging System Failure" came on and I was unable to start my car. I replaced the battery that same day. 30 days later and I am having a whining noise when accelerating and the "Traction Control System " warning light comes on for no apparent reason. The "Reduced Engine Power" light came on 2 days ago while sitting in heavy traffic and I lost all power. I was able to restart the vehicle and drive 3 miles before I lost power a 2nd time. I had the car towed to the dealer for service. They said it threw 14 codes but the only issue they could find was some moisture in the main connector. They took care of that and told me that if it happened again to bring it back. I drove the car the next day and the "Service Stability System" light came on. Would you have any idea what could possibly be happening?
The "Reduced Engine Power", problem causes the PCM to disable "Service Stability Control" and "Traction Control" turning on the warning lights to come on for those systems . The reduced engine power is because of a problem with the electronic throttle control system or as GM calls it TAC system .
Reduced Engine Power Mode
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The PCM will continue to use the accelerator pedal for throttle control, however, the vehicle acceleration is limited.
• Limited throttle mode--The PCM will continue to use the accelerator pedal for throttle control, however, the maximum throttle opening is limited.
• Throttle default mode--The PCM will turn OFF the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The PCM will perform the following actions:
- Limit engine speed to idle by positioning the TP, or by controlling the fuel and spark if the throttle is turned OFF.
- Ignore the accelerator pedal input.
• Engine shutdown mode--The PCM will disable fuel and de-energize the throttle actuator.
© 2017 General Motors Corporation. All rights reserved.
Drive by Wire training Your best bet , take it to a GM dealer
SOURCE: My 2004 Pontiac Grand Prix barely moves!!!!
Have you ever had the catalytic converter changed. Over time the pellets inside will melt together and this will make the care very very sluggish like it does not want to run. You may want to try that.
SOURCE: 1991 Pontiac Transport Engine stall
Problem mayby ECM control unit and couple fuse (EGN)
But your start motor working???
Code 12 meens "No distributor reference pulses to ECM/PCM"
SOURCE: 2003 Pontiac Grand AM will not start. Security light is NOT on.
sounds to me like you better find another dealer or possibly an auto electric dealer they should have done it right the first time
SOURCE: I have a 2004 grand
i had a problem with all my lights coming on in my 2006 explore took it to dealer to find out that the battery was dying replaced it and they went away
SOURCE: 2004 grand prix no go with traction control light on.
My car is doing exact same thing! I flushed radiator and now I have traction control light, reduce engine power, and enigine light coming on! My car sounds like **** and won't idle and no power! 04 prix gt of course. It was fine until I flushed radiator and put new thermostat in! What do I do?
3,257 views
Usually answered in minutes!
×