Question about 2004 Pontiac Grand Prix

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On my 2004 pontiac grand prix the engine coolant temperature gage will not move. It stay on the same position all the time . How i can find out what it is and how i can fix it

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You will need a scan tool, that hooks to your cars computer..to diagnois....

Posted on Dec 31, 2010

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Need a coolant temperature sensor wiring diagram for a 2004 pontiac grand prix gtp


Check engine light on ? The coolant temp sensor is a input to the PCM - engine computer ! All wires come from an go to the PCM . What type of problem are you having ? Maybe able to save you some aggravation an time chasing gremlins . Coolant gauge not working ?
Engine Coolant Temperature Gage
The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the powertrain control module (PCM) or the engine control module (ECM). The IPC receives a serial data message from the PCM/ECM indicating the engine coolant temperature. The engine coolant temperature gage defaults to 100°F (38°C) if there is a malfunction in the engine coolant temperature sensor or the IPC detects a loss of serial data communication with the PCM/ECM.

But if you insist ,you can find free wiring diagram's here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine ! Under system click on engine ,then under subsystem click on fuel controls . Click the search button then the blue link. The second an third diagrams both show coolant temp sensors . Both go to the PCM .

Jul 03, 2017 | Pontiac Grand Prix Cars & Trucks

1 Answer

2004 grand prix and the temperature gauge quit working we changed the temperature switch sensor still will not work


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

Oct 30, 2016 | 2004 Pontiac Grand Prix

1 Answer

Temperature gage only goes up a quater way. heater blowing warm air


make sure your t-stat isn't stuck open if you have the correct coolant levels

Feb 04, 2013 | 2004 Pontiac Grand Prix

2 Answers

2004 Pontiac Grand Prix is running warm about halfway. When I'm driving around it stays below half, but when I stop it heats up over half. then the fan turns on. Could this be a fan sensor? Is it not...


CHECK COOLANT LEVEL.IF COOLING FAN TURNING ON COOLANT TEMPERATURE SENSOR WORKING.BECAUSE IT CONTROLS AND TURN ON COOLANT FAN AT A SET TEMPERATURE.SOUND LIKE ENGINE RUNNING TOO HOT. HAVE RADIATOR FLUSHED.REPLACE THERMOSTAT. HAVE ENGINE BLOCK FLUSHED.REPLACE RADIATOR PRESSURE CAP ALSO.SEE WHAT HAPPENS.

May 09, 2011 | 2004 Pontiac Grand Prix

2 Answers

2004 ponitiac grand prix temp sensor moves up and down never really reaching 2 line on guage. Last night after driving for 20 mins it went all the way down and stayed there. Heat works fine it also has a...


check tenp sensor wire if its connected turn key on jiggle plug and wires while someone is watching gage with car at operating tenp .becarful doing this while car ir running due to moving parts

Dec 25, 2010 | 2004 Pontiac Grand Prix

1 Answer

Car over heated


NO ADD MORE COOLANT.THAT WHY CAR OVER HEATED.LOW COOLANT.ADD MORE COOLANT.CHECK FOR LEAKING RADIATOR HOSES AND CHECK AROUND THE RADIATOR FOR LEAKS LIKE LOOK DOWN BETWEEN RADIATOR AND COOLANT FANS FOR LEAKS.AND LOOK ON BOTH SIDES OF RADIATOR FOR LEAKS.

May 01, 2010 | 2004 Pontiac Grand Prix

2 Answers

Computor shows random misfire, 2004 pontiac gran prix


You may have a jacked up wire... or plug...this happen to me on my 2004 grand prix gtp 2 times...1 time one of my plugs was cracked the 2nd time my plug wire was laying on dip stick and started to melt....each time after replacing the plug and the wire it stopped misfiring...

Jan 04, 2010 | 2004 Pontiac Grand Prix

1 Answer

I have a 2004 grand prix, 3.8 in need of a thermostat.The engine is not heating up to operation temperature. Where is it located.


where the main radiator hose connects to the engine block, if you remove the hose (be ready to catch some coolant with a floor-catcher) it should be just inside there.

Jan 02, 2010 | 2004 Pontiac Grand Prix

5 Answers

Temperature gage not working,gas,gears gage are ok.


located the temp sending unit check that its pluged in, if it is unplug it and ground the wire to something metal (with the switch on) and see if the gauge moves if it does then your temp sending unit is bad and needs replaced

Aug 01, 2009 | 2004 Pontiac Grand Prix

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