Question about 2003 Chevrolet TrailBlazer

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Solution for reduced engine power in trailblazer

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Check compression on all cylinders

Posted on Aug 27, 2010

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Posted on Jan 02, 2017

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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

  • 1857 Answers

SOURCE: the 'check engine' light and the 'reduce power

A sensor failed. A code will be stored. You need to get the code in order to proceed. With over 200 possible codes its anyones guess what happened.

Posted on May 18, 2010

ryanlutton
  • 1138 Answers

SOURCE: The reduce engine power light

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.

Posted on Jan 27, 2011

  • 142 Answers

SOURCE: 2007 chevrolet trailblazer reduced engine

You'll need to read the engine code first thing.

Posted on Jun 04, 2011

emissionwiz
  • 76630 Answers

SOURCE: 2002 Trailblazer, Reduced Engine Power

Hello
Whenever this warning light comes on it is indicating that a problem has been sensed by the electronic sensors of the engine and or the transmission and the on board computer (called the PCM) has limited the engine power to avoid further damage to the system components like the engine and transmission. What needs to be done (and is stated in the owners manual) is take the car in to a GM dealer or a suitable trusted service center and have the electronics tested for the fault codes that are stored in the system whenever the light is turned on that would indicate what part of the electronic controls (this can be a sensor, wiring or the computer, it can also be a mechanical fault) has malfunctioned. Due to complex nature of the system guessing will waste your time and money, there are at least 100 different faults that will trigger this warning. Once the technican has the fault codes and has driven the car they can begin diagnostics of the problem(s) indicated by the stored fault codes.

Posted on Aug 21, 2011

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Dec 10, 2012 - Tech Tip: Reduced Engine Power Message Displayed on GM Vehicles ... Model year 2008-'10 vehicles must have the engine control module (ECM) reprogrammed ... Do not drop the electronic throttle control components.

Oct 28, 2015 | Cars & Trucks

1 Answer

Emission light came on and so did reduce power light. It happens when I quickly excellerate from 10 mph but will reset if turned off


2003 Chevy Trailblazer-CHECK ENGINE LIGHT AND REDUCED ENGINE POWER ...

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Dec 23, 2011 - 2003 Chevy Trailblazer-CHECK ENGINE LIGHT AND REDUCEDENGINE POWER ... The reduced engine power ligth comes on and I lose power. ...Next, the fan clutch failed -- which is when he did an "above and beyond" .... yesterday I have not replaced anything bc they have told me nothing is wrong.

Oct 15, 2015 | 2002 Chevrolet TrailBlazer

2 Answers

2004 trailblazer reduced engine power light on and no power,had diagnosed couldn't find any problem, what to do ?


You didnt have it diagnosed very well. When REDUCED POWER message comes on, a fault code is stored. Take it to someone with more equipment and training who actually knows your vehicle. The specific reason behind reduced power can be caused by MANY MANY components or conditions. It needs to be checked by someone with a good quality GM scantool and knowledge of fault diagnostics. If this is a NO CODES STORED issue, then its possibly a memory or live faulting issue. Again, needs to be checked professionally with the proper equipment.

As to people suggesting CHANGE THE O2 SENSOR or CHANGE THE MAF, dont listen. Only change what is tested and bad. Otherwise you are wasting time and money.

Mar 27, 2015 | 2004 Chevrolet TrailBlazer

1 Answer

I replaced my accelerator pedal position sensor on my 03 trailblazer because reduced engine light came on and when gas pedal pressed it did nothing. with new sensor it still does nothing, what do I do


The most common problem on your trailblazer if it has a 4.2 liter engine is the cam shaft actuator gets stuck due to a clogged screen. If the reduced engine power light is on then the check engine light should also be on. You need to check for fault codes to see what step you need to do first.

Oct 30, 2014 | Cars & Trucks

1 Answer

Reduced engine power


Your vehicle seem to have gone into limp home mode. You need to have the fault codes pulled to know what is wrong. Limp mode lets you get home but limits engine output function.

Nov 17, 2013 | 2004 Chevrolet TrailBlazer

2 Answers

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

1 Answer

The light of an engine with an arrow pointing down in it what do that light mean


It means reduced engine power. Check for vaccum leaks and at the very least, clean your throttle body. Reduced engine power is like a safe mode, needs to be check out right away.

Feb 21, 2011 | 2006 Chevrolet Trailblazer

2 Answers

Reduced engin power light is on


Your Trailblazer's ECM has detected an issue with your engine's performance and has reduced the power till the issue has been addressed. Auto Zone can scan your Trailblazer for the DTC codes and can give you the recommendation for you to address the issue causing your engine to reduce the power. There are just to many things that can cause the engine to reduce the power, so the best bet is to have it scanned and Auto Zone scan free of charge. Good luck and hope this helps.

Feb 01, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

Reduce engine light comes on with a/c use.


Most likely it is the fan clutch as it is computer controlled. I have had 2 in the shop this year with the same problem. To be sure, have someone check the codes before you start spending your hard earned dollars.

Aug 31, 2009 | 2002 Chevrolet TrailBlazer

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