reduced engine power light on 2002 Chevrolet Trailblazer

check engine and reduce engine power light comes on particularly when it is cold.

by in Belmar, NJ on April 14, 2009
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3 answers 4 comments
ANSWER by , April 14, 2009
When the reduced engine power light comes on a fault code will be set in the powertrain control module. Reading the code and following the releated diagnostic information should help lead to the cause of your reduced engine power light coming on.
ANSWER by , October 17, 2010
I just spent $200.00 for a new alternator...after no relief I remembered My ski doo..when the rider plug was in the half connected position it sputtered and would not rev up....Look on floor..go to the gas pedal...wiggle the wire bundle at the plug and try the engine. I did this and it cleared it up instantly.....expensive lesson to learn.....
COMMENT by , October 25, 2010
Poor connections at the gas pedal or the throttle body are always a possibility when diagnosing "reduced engine power faults". If the connectors are loose or damaged and cannot be properly secured or the wiring is damaged then appropriate repairs should be completed to avoid reoccurring problems.
COMMENT by , January 21, 2011
I have had this happen twice with my 04 Trailblazer, once last winter and again today. Both times it was at least 20 below zero so it definitely has something to do with the temperature. Both times I let my vehicle run for a bit and then I shut it off and started it again. It works fine after that. After the first time I took it to a dealer and they couldn't find anything wrong with it.
ANSWER by , December 03, 2015
I have a 2003 Trailblazer LTZ with approximately 176k miles on it. Never really had any major problems but over the last year and half issues with the reduced engine power light and service engine light has plagued me. Having to pull over and restart my car and reset so that I could drive again normally. I went on several Chevy blogs to see what could be going on with the car. As you might guess I found out that I was not the only one experiencing this issue. So I started with what the on-board computer code was indicating a problem with the "Electronic Fuel Throttle", I removed it from my Trailblazer and cleaned it the best I could (I am no mechanic) and reinstalled (no help). Then I replaced the fuel filter and air filter, still no help even thought I'm sure it helped performance some. I then took it to a real mechanic and he drove the car and said I needed to replace "Fuel Throttle" at a cost of just over $700.00. That's when I found the reviews on Amazon of others with a similar problem and replacing their accelerator pedal with sensor in it. I ordered the part based on the reviews of this pedal. I received it as promised and installation was a breeze. Problem solved no more reduced engine power and service engine light so far and loved the fact I saved money the was not unnecessarily spent. I hope this posting will help others out there with this issue.
COMMENT by , March 24, 2016
hi i have the same problem i took my truck to diferent mechanic they just wasting my money throttle sensor .till today iwent to a person he told me the same thing you said it is the gas pedal wire or sensor .but my question is i went to ebay .but i seed that they sell the whole pedal without the wire .they have the wire separated but i dont know if is the right one .can you help me please thanks
COMMENT by , March 24, 2016
Hi, I am not sure about the wire. I purchased the complete pedal with sensor. I removed my accelerator pedal per some on line instructions (about 4 bolts) and it unplugs. I bought my new pedal from Amazon.com for about $85.00 I believe. Part is made in Mexico and have good reviews. By the way I still have had no problems since I replaced the accelerator pedal. I hope this helps u.