Question about 2003 Chevrolet TrailBlazer

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My reduced engine power light comes on after a short distance of driving

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Trailblazer start up cold and drive a short distance and it will not crank just turns over

Posted on Jun 27, 2010

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Posted on Jan 02, 2017

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SOURCE: 2001 GMC YUKON REDUCE ENGINE POWER ON MESSAGE BOARD

The following is a post from another site. I had the same problem and this worked for me.

Hello all,

I just wanted to share with everyone with the problem that I had withmy 2003 1500HD Crew Cab with 6.0 Liter. My truck would go into reducedengine power off and on. Sometimes one a week, sometimes 5 times on a20 mile trip. My problem was a broken wire on the plug in going in tothe throttle body. In the picture is the plug in that had caused me allof my pain and grief....... My problem was very intermittent and washard to diagnose. I started vehicle and with all codes clear. I wiggledthe wiring harness in the picture and vehicle spit and sputtered,throwing it into reduced engine power mode, and then smoothed out to asmooth idle. I disconnected the plug and pulled wires out of plug endand found a broken wire. Mine was a brown wire with white stripe. BUT,what was interesting, was that this vehicle had apparently had the smaeproblem with previous owner, becuz there was another wire (yellow wire)right beside the one that I found broken already soldered up and tapedfrom where it had apparently happened before. This was my problem andnot my truck is running great, and actually even idles better thatbefore. Hope this helps with any problems that anyone else is having. Iknow this problem can be very irritating.

http://i184.photobucket.com/albums/x191/bunchtst/BrokenWire.jpg




Posted on Mar 26, 2009

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2 Answers

Diesel. Reduce power lite turned on. Shut off engine and started back up - lite is off. Can it be driven?


Jerry, Drive to a good shop. So many things can cause reduced power light unfortunately. The first step would be to get the truck hooked up to a scanner/computer and have the computer scanned for trouble codes. One thing that you could try is to drain the water from the water separator that is mounted on the frame under drivers front door. If the PCM picks up on water, power is reduced until water is removed/drained. It could be an exhaust sensor that is reading faulty. Unfortunately from here its impossible to tell you exactly what the fault is because there are just so many engine sensor inputs that could cause your problem. Check the attached links, forums,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

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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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Oct 07, 2015 | 2006 Buick LaCrosse

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What if my engine power reduced light comes on?? can I still drive it?


Yes but only for a short distance.
The engine computer is working in limp mode to allow the driver to get to a shop for repairs.
Check your owners manual for details.

Feb 24, 2015 | 2006 Chevrolet Impala

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Reduce engine power intermittent


Run a diagnostic test to see what codes come up and go from there.

Oct 04, 2014 | 2002 GMC Envoy

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I just had the transmission in my 2004 trailblazer


There is a harness in the engine compartment that has grounded out or shorted. The message 'reduced power' will flash across your driver information display on your gauge cluster. This is somewhat of a common problem for full size Gm trucks (silverado, tahoe, suburban, etc .) and trailblazer/envoy vehicles.

Sep 26, 2014 | 2004 Chevrolet TrailBlazer

1 Answer

What causes the "Reduced Engine Power", "Service Stability Control" and "Traction Control" warning lights to come on?


the "Reduced Engine Power", problem causes the PCM to disable "Service Stability Control" and "Traction Control" turning on the warning lights to come on for those systems . The reduced engine power is because of a problem with the electronic throttle control system or as GM calls it TAC system . 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 PCM will continue to use the accelerator pedal for throttle control, however, the vehicle acceleration is limited.
• Limited throttle mode--The PCM will continue to use the accelerator pedal for throttle control, however, the maximum throttle opening is limited.
• Throttle default mode--The PCM will turn OFF the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The PCM will perform the following actions:
- Limit engine speed to idle by positioning the TP, or by controlling the fuel and spark if the throttle is turned OFF.
- Ignore the accelerator pedal input.
• Engine shutdown mode--The PCM will disable fuel and de-energize the throttle actuator.
© 2017 General Motors Corporation. All rights reserved.



Drive by Wire training Your best bet , take it to a GM dealer

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Plug code reader


Your car went into back up mode. this is usually a serious engine problem or just bad gas.

Apr 20, 2014 | 2006 Chevrolet Corvette

1 Answer

Check engine light came on while drive home from vacationon I-75N at 70 MPH. Did not come on again next day while doing errands. It's a stead light - no clashing. Is it safe to drive short distances...


HI
when no fault in engine or transmission detected currently ??
"Is it safe to drive short distances until next paycheck?"
after check it ask us for more information !
WITH MY BEST WISHES

Jul 17, 2008 | Hyundai Sonata Cars & Trucks

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