Question about 2003 Chevrolet Avalanche

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The engine light comes on and the reduced power is activated ,there sensors were tripped all to do with the throttle . the auto shop ended up replacing the throttle body and the problem just happend again a week later what sensor should be replaced or what do you suggest 2003 chevy avalanche 1500

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  • Ruben Mercado
    Ruben Mercado Jul 23, 2015

    My 2003 avalanche does the same thing when it happens I put it in park move the ajust pedal on the drive door then it stops I have been told it could be pedal senor or throttle sensor for now it works just moving the pedal button.

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My 2003 avalanche does that I would park it then press the pedal ajust button then start it up truck is fine I was told could be pedal senor or throttle sensor. For now it's good.

Posted on Jul 23, 2015

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I'd bring it back to the shop that put in the throttle body and have them check to see if the replacement was defective or failed. If not, you may have a bad throttle position sensor [part of the gas pedal] I'm assuming it worked fine for a while after the repairs with no problems then suddenly started acting up again. I've replaced a bunch of throttle bodies but only one position sensor so far. There's always the chance that there's a bad wire somplace or some other more exotic problem but I'll bet you'll find it at either the sensor or throttle body. Good luck, hope this helps!

Posted on Aug 01, 2010

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1 Answer

What does it mean when my reduce engine power light come on


Not sensor , SENSORS ! This message reduced engine has to do with the electronic throttle control !
Throttle Actuator Control (TAC) System



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Have the vehicle checked for DTC'S - diagnostic trouble codes ! Do you know what electronic throttle control is ? The gas pedal assembly has electrical connector an sensors inside ,hooked to the PCM / ECM - engine computer . The engine computer uses these position sensors inputs to control the DC motor on the throttle body to open the throttle plate to control the speed . Plus there are position sensors inside the throttle body to input PCM/ECM to see if it's calculations are corect . Your best bet maybe to take it to a qualified repair shop .
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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:
- Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned off.
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• Engine shutdown mode--The control module will disable fuel and de-energize the throttle actuator.

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still sounds like another sensor is bad. take it to shop and have it tested would be my suggestion. good luck.....

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Well, the ETC light often comes on as a result of a sticky throttle plate, but doesn't trip the Check Engine. First, I'd clean the throttle body plate off. You do this by removing the big air box on top of the engine and just cleaning all round the inside of the throttle body with a rag and some carb cleaner.

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Oh, and depending on what tripped the check engine light, Chrysler has a funny way of just leaving the light on for a set period of time. If the problem is resolved the light will stay on until you drive a certain distance, above a certain speed. Unfortunately, this varies and I just don't know what your SUV needs.

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4 Answers

Why does reduce engine power light comes on chevy


That is a hard problem to pin point without knowing what codes the computer has stored. It can be any number or sensors or engine problems.

You can go to most auto parts stores and they will pull the codes for you for free.

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