20 Most Recent 2004 Pontiac Grand Prix - Page 4 Questions & Answers

Do you have a check engine light on? If not then you have a defective gage, the gage is a computer generated display and you will need to remove the instrument cluster and send it out to be rebuilt. Cost about $250

Many harnesses in an engine compartment.

You need the code, to get that you need the car's VIN and the radio serial number. Go to www.radio-codes.com to obtain the code for a fee.

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With a v engine probably one in each bank. Maybe close to exhaust, it may use heat shield. One wire connector, the wire color is dark blue. The picture is for knock sensor 1.

Pull the 10a onstar fuse from the interior fuse box found on the passenger side fuse box.

Dirty fuel system, dirty air filter, clogged PCV valve...dirty throttle body...clean all to be sure...Hope this helps.

the system is in limp mode because of a real problem with either the engine or transmission have the fault codes read, fix what is found and reset the ECM

Hi Helen, The link below is a FREE user manual for your 2004 pontiac grand prix, Take care and CHEERS... http://www.vadengmpp.com/owners-manual/pontiac/2004-Pontiac-GrandPrix.pdf

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