Question about 2004 Pontiac Grand Am

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Engine coolant temperature gauge alarming. this 2004 grand am pontiac se1. while driving even a short distance, the temperature gauge alarming .Is that over heating and also few minutes after the temperature gauge will go down a bit.

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Lol..buy a new car! are you dting someone?

Posted on Oct 19, 2010

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Posted on Jan 02, 2017

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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

1995 pontiac bonneville 3.8L temp gauge maxed, engine norm temp


Possible bad sending unit or shorted sending unit wiring.

Jun 07, 2013 | 1995 Pontiac Bonneville

1 Answer

2004 Pontiac Grand Prix Temp Gauge not working and car not running properly.


I would check the coolant temp. sensor it should be in the head and have one wire on it. The manufacturers program the computers to change the air fuel mixture, and idle higher when the engine is cold. If the engine is at normal temp and the computer thinks its not it could be idling it up to bring it to proper operating temp.

Jan 19, 2012 | 2004 Pontiac Grand Prix

1 Answer

My check engine light is on, and today my temperature gauge stopped working and we have replaced the engine coolant sensor and the connector and temperature gauge still not working. PLEASE HELP


Could be the thermostat. I know nothing about cars but I noticed my 2000 Grand Prix temp gauge was not going to the normal level. My wife drives this car so I didn't notice it for a month or so. Eventually the Engine light came on. Took it to Autozone and the code came back as P0180... (1) low coolant (2) bad thermostat (3) enginge fuel temp sensor. They used a code reader that was about the size of an Ipod nano.

Coolant was okay, so took it to my mechanic. His netbook sized computer showed it was the Thermostat. He reset the codes and the temp guage went back to normal. Was short on $40 for the fix at the time, so I parked the car and promised to bring it back in 3 days. Went out and checked the car a day later at 25 degrees outside without starting the car... gauge still sitting at the normal level. No question it's the thermostat. That car will not be driven again until T.stat is fixed in 2 days.

Oct 18, 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

1 Answer

My 1996 Hyundai Accent Auto will start perfectly from cold but when i have driven sometimes even short distances in hot weather and turn off car it will not start again for sometimes over 1 hour. The...


Seems to me it's the engine coolant temperature sensor or the connecting wire to it. Some Model/Year (MY) hyundai's have TWO (2) temperature sensors.. one for the instrument panel/gauge, the other strictly used by the ECU (Engine Control Unit)... if this sensor goes bad, it sends the wrong data/signal to the ECU and this can affect engine performance.

Jun 29, 2009 | 1996 Hyundai Accent

1 Answer

Possible overheating, 2004 pontiac montana


Its definitly a bad reading, you would know if your vehicle is overheating, you can usually smell it right away.I would say its your temperature gauge sending unit is defective, check the wires to see if they are well connected or broken. ask a backyard mechanic for assistance.

Nov 19, 2008 | 2003 Pontiac Montana

2 Answers

2004 Pontiac Grand Am SE1 loud noise


It is probably the wheel bearings they have been known for that.

Oct 26, 2008 | 2004 Pontiac Grand Am

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