Question about Chevrolet Suburban 1500

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My 2003 Chevy Suburban runs fine and everything is good, then all of a sudden the reduced engine power message comes up. I can pull over kill the engine for twenty or thirty seconds and then we go on. Sometimes it won't happen again for the rest of the day and sometimes it might happen within ten miles. It happens regularly first thing in the morning.

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This may be a computer problem or fuelpump, i would start by having the computer scanned for any stored codes. these codes will help in pin pointing the problem so start there. hope this is helpful. good luck.

Posted on Sep 04, 2010

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Reduced Engine Power message comes on along with the engine light. It does this off and on. Sometimes it runs good and sometimes it barely runs at all. What causes this?


need to have vehicle scanned the trouble codes will be stored in the computer most auto stores offer thi service for free check ur local area there are a few hundred different codes or problems that can cause ur problems and being interment can also be an electrical connection/harness problem

Jun 28, 2011 | 2003 GMC Yukon

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We have a 2003 chevy suburban 5.3 vortec it dies when warmed up


Sounds like either Air mass sensor, Air mass meter or finally the EGR valve this is the exhaust gas recycler I would say that is the fault when they start to go this is what they do until finally the car will barely move.

Also I would check all your air pipes for leaks make sure there is no rips or tears in the pipes, The car will drive fine like you say until you ease of the gas to a stop position it **** in to much air and kills the engine. Air faults are cheaper so look there first.

Hope this helps

Regards
Dan

Jan 31, 2010 | 2003 Chevrolet Suburban 1500

1 Answer

I had my engine light come on with a "reduced engine power" message on the dash...and I couldn't go faster than 30 mph


engine was sent into what they call the limp mode ...because................ either your tranny or engine has issues.....run your trouble codes and check your tranny fluid

Jan 14, 2010 | 2003 Chevrolet Suburban 1500

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2005 suburban stabilatrac disabled


The Reduce Engine Power problem on my 03 Suburban went away when I had to replace the fuel mixing sensor. I damaged the sensor by topping off with E85 (ethanol) by mistake late at night. The vehicle just would not turn on in the morning. The vehicle had to be towed to the dealer. I was in Carlsbad NM about 800 miles from home. I had no choice but to pay $1,100 to get it fixed. At the same time the Reduce Engine Power problem went away. And thanks to God it has not come back for nine 9 months now.

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