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2006 pontiac g6 gt having trouble running in cold weather

The car's been suffering from problem with Engine Power Reduced on display for a few months. It only has this problem in cold weather. Error codes showed TPS Sensor issue earlier, but now scanner won't even connect to computer. Starts up and runs fine in warmer weather. Now won't start at all on some cold mornings. Couldn't run heat or defrost while driving or ENGINE POWER REDUCED would display then would lose power. Engine would continue running, but gas pedal wouldn't respond at all. Had water leak at one time that dripped over driver's side door, but only when rain was heavy and for a long time. Someone mentioned that may be causing the problem. Where do I start?

Posted by Anonymous on

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 508 Answers

SOURCE: 2002 reduced engine power light

You have some kind of ECU problem. You will need to hook to the diagnostic port to find the problem. Your vehicle has gone into limp mode. This enables the vehicle to run, but at a diminished level until you can seek help for the problem. Do not continue to drive it this way as you may cause damage to the engine depending on the nature of the problem.

Posted on Feb 17, 2009

  • 14036 Answers

SOURCE: Message ' Reduced engine performance'

sound like transmission slipping .fuel filter clogged.turbo stop woking.dirty fuel injectors.

Posted on Apr 16, 2009

  • 1 Answer

SOURCE: Reduced power code comes up and my truck stalls.

I had the same problem, and the solution was cleaning the throttle body, it does need to be completely removed to be cleaned thoroughly. I just used some brake cleaner on a rag to clean off all the carbon deposits. A friend of mine who is a dealer tech had only seen this trouble code once, and this was the solution. So far, my light has not come back on and the truck is running alot better at idle.

Posted on Aug 14, 2009

  • 25 Answers

SOURCE: chevy malibu displays engine power reduced

It's fuel related, check your fuel filter to see if it's clogged, let me know. Good luck, Jim

Posted on Sep 10, 2009

SOURCE: reduced engine power on

The traction control uses the speed sensor in the transmission and the wheel speed sensors to determine wheel spin. If a wheel spins braking is applied to it so that the power can be transferred to the other wheels. At some point the ECU detected a gross disagreement between the sensors and so as a precaution has entered into a limp home mode. On some systems if the fault is in error it can be cleared by putting the car into drive and moving forward a meter, putting in reverse and going a back a meter and doing this three times. If one or other of the sensors are faulty this process will not allow the error to be cleared. You need to check or have checked the error codes and the speed sensors.

Posted on May 28, 2010

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