Question about 2003 Chevrolet Tahoe

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Check engine light "reduced enging power" message?

2003 Tahoe 92000 miles no previous check engine lights in past. Last nite light came on and message on instrument panel read "reduced engine power". This morning the message is gone but check engine light is still on. Wasnt sure if the light is just a reminder to change timing belt or have some regular maintenance performed. any ideas?

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  • nizaka Apr 14, 2009

    I have the same problem.  I have not been able to find a solution.  The truck will run fine 400-500 miles and then it happens again.

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Hook it up to OBD 2 scan retrieve fault code and go from that point!

Posted on Dec 24, 2008

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Reduce engine power that code is came from your trotttle body check for the faulty wiring and check also the power ground its located top left rear of the intake

Posted on Jan 19, 2015

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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.

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Reduced engine power warning


there is a acuator that contolls the throttle they dont use a cable anymore. thats were i would look 1st

Jun 12, 2012 | 2003 Chevrolet Tahoe

1 Answer

In my 2007 tahoe power reduction message comes on what could be the problem


Your Tahoe goes into "Power Reduction Mode" to keep you from continuing to operate the vehicle with an OBVIOUS problem and destroying high-dollar parts like catalytic converters, cylinder heads, etc.. Yeah, the old days of simply ignoring Check Engine lights are over.... The manufacturers have made it so the engine will go into reduced power mode and FORCE you into properly maintaining your vehicle.

(Not saying that you don't maintain your vehicle...Just pointing out that you can thank all of those people that continuously run around with warning lights SCREAMING all over their dash for the wonderful little "Reduced Power Mode" feature.)

As for what could be actually causing thie problem? Well, just let me say that the last time I counted, there were over 600 "generic" OBD fault codes available for most cars (80% of which will turn the Check Engine light on long before reduced power mode takes place), and several hundred more "vehicle specific" fault codes that have not yet made the generic code list.

So, to put it simply, you will have to scan your computer network and gather all the fault codes and perform fault code diagnostics to determine the actual cause of your problem.

Jan 10, 2012 | 2004 Chevrolet Tahoe

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I get a reduce engine power message, the truck shuts down, but with enough power to get off the road. I shut it off for about 30 secs and then all power is back. The engine light remains on though. Some...


You'll probably need to have a mechanic read your computer, either the fuel pump relay is going bad or it could be a body ground problem in the computer.

Oct 19, 2010 | 2003 Chevrolet Tahoe

1 Answer

I have a 2003 Chevy Tahoe. No problem this


have the codes pulled this will get you in the right direction most autozones and the like do it for free

Dec 15, 2009 | 2004 Chevrolet Tahoe

1 Answer

Check engine light


The gasket or large o-ring on the under side of the cap might be warn not keeping a tight seal. replace gasket or o-ring, or get a new cap, and see if that cures it.

Jan 31, 2009 | 2004 Chevrolet Tahoe

2 Answers

2004 Chevy Tahoe - Reduced engine power message


have autzone check for any stored trouble codes, replace the fuel cap, make sure you have plenty of gas

Jul 20, 2008 | 2004 Chevrolet Tahoe

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