Question about 2002 Chevrolet Tahoe

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My 03 chevy tahoe has a code dhat is po179 is not pas inspection

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Sounds like the fuel composition sensor is bad causing it to run rich .. Is your Tahoe a flex fuel ?

Posted on Apr 08, 2011

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Posted on Jan 02, 2017

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1 Answer

Have 2003 chevy tahoe with codes p220 and p120 also p1516 already replaced the throttle body accuator and still come up with the code p1516


There is a Tecnical Service Bulletin (TSB) that specifically addresses codes P0120, P0220, and P1516.

It says that the TAC Module can set these codes erroneously under certain conditions. It is very likely that if your vehicle is diagnosed according to the provisions of this bulletin, the problem can be corrected without having to purchase or replace any parts.

It is Technical Service Bulletin number 03-06-04-032
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Please also review this article: What Else Could Be Wrong?

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Our 03' Chevy Tahoe's engine temperature gauge has been running low- typically around 180, sometimes going all the way down to 160. It used to sit conistently around 200. Any ideas why this would be...


It's quit possibly a failing gauge. It's common for them to go out on 03-06 Tahoes at around 50-80,000 miles. Check this page for more on the problem and how to get it fixed - Tahoe Gauge Repair

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1 Answer

My chevy tahoe 03' model has a saying coming up reduce engine power? what could be the problem? the rpm is like reving up to 2.


have your cars computer codes read at a parts store. there is something wrong with your vehicle that it is retarding the ignition and doing other things to protect itself from damage due to some problem with engine....your codes should give you specific details on whats wrong.

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have the a/c compressor checked, the a/c compressor might be locking up due to wear and bad bearings. one way to test is to try turning the compressor clutch while the ENGINE IS OFF, if the clutch is very hard to turn or won't turn at all by hand then the compressor is bad. the clutch is what turns the pully, the pully should spin freely, the compressor clutch is on the end of the compressor on the pully side.

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1 Answer

PO179 CODE


P0179 Fuel Composition Sensor Circuit High Input. May have got some bad fuel somewhere. I would erase your codes and see if it comes back. If it does I would take your vehicle to the stealership to have it diagnosed a little further. Thanks for using fixya.

Sincerely,

IC

Jan 08, 2009 | 2002 Chevrolet Suburban

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