Question about 2003 Chevrolet Tahoe

2 Answers

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?

Posted by on

  • 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.


2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,114 Answers

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

Posted on Dec 24, 2008

  • Level 1:

    An expert who has achieved level 1.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 17 Answers

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

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I just want to know what bulbs I need to replace all of the interior lights in the dash board of my 2003 Chevy Tahoe, 2WD 4.8l with tow package. O'reily's says PC195 for all, but is that for every dash...

G,man,can't help myself:400 miles!But u got internet and fedex hopefully.
General advice:dashboard bulbs are all equal in form may have different powers (can be colour coded),so ceck the bulbs first.
Dome and others places are different,ceck bulbs in place.
Internet orders (like ebay) may provide cheapper material (+more info,u must digg).
Doubt the dash replace will be best choice,tricky bussines,besides it will show different millage...
Cheers,hope u deal it,let the people know.

Oct 27, 2013 | 2003 Chevrolet Tahoe

1 Answer

Reduced Engine Power light

With GM vehicles a Reduced Engine Power message has to do with the electronic throttle control .

GM Chevy Truck REDUCED ENGINE POWER Case Study Part 1

May 03, 2017 | Cars & Trucks

1 Answer

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

The check engine light keeps coming on in my 2004 Chevy Tahoe. At first when it came on, it would show a warning message that states Reduced Engine Speed and the Tahoe wouldn't have any power. Now, it's...

Most auto parts stores have Scanners that can read the actual Codes causing the check engine light- usually for FREE. Google the Codes to determine what needs fixed.

Do not continue to drive it, as it may cause permanent damage!


Jul 23, 2010 | 2004 Chevrolet Tahoe

1 Answer

Reduced engine power

go to a parts store like autozone they should scan for free

Jan 04, 2010 | 2003 Chevrolet Tahoe

1 Answer

Why does my tahoe keep displaying reduced engine power? The drivetrain and traction control lights also came on.

There is a service bulletin for this concern.The number is 07-06-04-019A.It has to do with the body harness instrument panel connector.It is on the left hand kick panel area inside the instrument panel.You should have the codes checked.You will probably have a P 2138 code.This is for the accelerator pedal position sensor 1 and 2 correlation.Hope this helps.

Dec 19, 2009 | 2005 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

My 2003 Tahoe makes an erratic dinging noise that coincides with a message saying to ''Check the brake system'' and the check engine light also appears . HELP!!!!!! We have already changed out the...

this is an error signal not an instrument panel problem take your car to an autoparts store and, ask them to check your error codes; they will do this for free

Sep 10, 2009 | 2003 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

Not finding what you are looking for?
2003 Chevrolet Tahoe Logo

1,345 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

74544 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22082 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7268 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides