Question about 2002 Chevrolet TrailBlazer

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2002 reduced engine power light

2002 CHEVY TRAILBLAZER " REDUCED ENGINE POWER" LIGHT IS ON. HAS BEEN ON FOR A FEW MONTHS HOWEVER RAN FINE. NOW THE LIGHT IS STILL ON AND IT VIBRATES SO MUCH EVEN WHEN ITS NOT MOVING. MAKES A VERY LOUD SOUND WHEN ENGINE IS RUNNING. WHAT COULD BE CAUSING THIS TO HAPPEN??

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  • Sasseelee66 Apr 28, 2009

    I had the same problem with the engine running very rough almost like it was missing. Yesterday it broke down on me after making a loud whining noise and I lost all power. I had it towed and I was told by the mechanic it was the water pump. I don't know about that as it didn't overheat or seep water. I do know that I have a bad cam sensor that the place I bought it from was going to replace. I just want to be sure it is fixed right!!! What happened to the good old fashioned engines anyone could work on????

  • Anonymous Mar 17, 2014

    my reduced engine power light came on and wouldn't do more than forty its out now and will go faster but runs ruff what could it bereduced power light trailblazer

  • Anonymous Mar 29, 2014

    replaced spark plugs and cleaned throttle body now ses and reduced engine power lights are on and it runs erratic

  • Anonymous Mar 31, 2014

    2004 trailblazer reduced power light

  • Anonymous Mar 31, 2014

    2004 trailblazer reduced engine power light

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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

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Try changing the gas pedel. I have one if you want to buy it. I will sell it for 120 bucks. Four one nine nine two nine 5229. Scott

Posted on May 29, 2014

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Rattling noise in engine of my 2002 chevy trailblzer step on gas engine stumbles


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Apr 09, 2013 | 2002 Chevrolet TrailBlazer

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Engine won't start and shows trouble code P1516 and reduced engine power light is on


Here is the definition of the code.

Possible causes - Faulty Throttle Actuator Control (TAC) module
- Throttle Actuator Control (TAC) module harness is open or shorted
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P1516 CHEVROLET Description The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. The TAC module continuously test the integrity of this data. When the TAC module is unable to write or read data to and from Random Access Memory (RAM), or the TAC module is unable to correctly read data from the flash memory or and internal TAC module processor fault is detected and the Detected Trouble Code (DTC) is set.
Read more: http://engine-codes.com/p1516_chevrolet.html#ixzz286Gl3cSo

Sep 28, 2012 | 2002 Chevrolet TrailBlazer

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Chevy Reduced Engine Power and Auto Gear Transmission


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

Aug 13, 2012 | 2002 Chevrolet TrailBlazer

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Code p1221 on 2002 Chevy Trailblazer


its drive by wire system you need a new throtlebody/ acuator

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The reduce engine power light has came on I have a 2002 Chevy Trailblazer, what does this mean?


A lot of times it's a filthy or sticking throttle body. With this situation, the computer will throw the reduced engine power light as kind of a safe mode. A lot of times, you won't be able to go past a certain speed too. With the battery disconnected, clean your throttle body with throttle body cleaner. Must be shiny. When finished, drive around for 20 minutes or so, so your computer can re-learn the correct settings of a newly cleaned throttlebody. When driving for 20 min, make sure all accessories are off.

Jan 27, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

My 2002 chevy trailblazer reduced engine light and the car is on but loses almost all power if i turn it off then on it works for a while then goes out again any solutions


good day. you may have a faulty battery, have it checked. if the battery is fine then you may have an alternator problem, have it replaced. hope this helps, have a nice day

Feb 04, 2010 | 2002 Chevrolet TrailBlazer

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