Question about 2003 Chevrolet TrailBlazer

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Reduced Enging Power

I have a 2003 Chevrolet Trailblazer. The reduced engine power and the service engine power light comes on when I crank it up while its cold outside....Mainly in the morning while getting ready to leave for work. Put it on a hand held scanner it gave code of P0601 check int module memory error but when i looked up the code in the book it said check power tran module memory error.. What do u think or what can you advise?

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  • mboek Nov 20, 2008

    the same problem happend to me tonight, what did your problem end up being?

  • Roland
    Roland Dec 11, 2008

    Our '03 Trailblazer acted the same way during a long trip when it got below 1/4 tank. We added gas and it pepped right up. Seems strange to me because it has never had this problem before. I suspect a problem with the fuel pickup inside the tank.

  • Anonymous Dec 15, 2008

    I have this same problem but this happened when it wasn't cold outside. It happened to me while i was driving from work to home. Reduced Engine Power light came on then it slowed down to maybe 10 miles per hour. But the RMP gauge stayed reved up and wouldn't come down. As soon as i disconnected some wires in the front of the truck it ran greater then usual. It also happened to me on a road trip from Tenn. to Texas on a very hot summer day. They said I may need to replace the electrical harness unit? Not sure what's what or even what I'm supposed to agree to when it comes to getting something fixed. Any suggestions, are welcomed...

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Needs a fuel pump. we just keep it above 1/2 for now and it runs great

Posted on Mar 22, 2009

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You are just going to have to change the pcm see if you can find one to just swap them out to verify the problem

Posted on Nov 14, 2008

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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 control module will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited.

?€¢
Limited throttle mode--The control module will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.

?€¢
Throttle default mode--The control module will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.

?€¢
Forced idle mode--The control module will perform the following actions:

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Ignore accelerator pedal input.

?€¢
Engine shutdown mode--The control module will disable fuel and de-energize the throttle actuator.

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