Question about 1997 Pontiac Grand Prix

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Ho to erify ifthe ecm in my 197 pontiac grand prix is bad

My car starts but cuts of 5sconds later or when its put in gear. about 10 trouble codes poppd up in the scanner from mass air flow sensor high circuit ad low circuit to tps circuit out of range. all grounds are good and has the proper amount of voltage at each sensor on throttle body and upper plenum

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By sysmptom and careful diagnostic work by a trained automotive electronics technician.

Posted on Mar 27, 2014

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I have a 1992 pontiac grand prix le 3.1 on my dash code it show is it blinks once then 2 time wat dose that mean


Check battery terminals. If they are secure and not corroded, it could very well be your ignition switch. They are known for.going bad in GPs. After 100-150k

Jun 23, 2014 | 1992 Pontiac Grand Prix

1 Answer

91 pontiac grand prix ecm getting fire but coils arent firing


maybe you need to reprogram the computer and needs the special code from dealer.

May 14, 2017 | Pontiac Grand Prix Cars & Trucks

1 Answer

Engine shakes when put in gear


sounds like a coil is going bad.Do a complete tune up and put new coil or coils whatever that vehicle has. That should solve that prob.

Nov 06, 2012 | 2004 Pontiac Grand Prix

1 Answer

I have put 3 catalytic converters on my 2002 pontiac grand prix in the last 3 years, because it won't pass emissions, could something else be wrong?


Sounds like it might be running to rich.I would replace the fuel pressure regulator because it cause a rich condition.When the engine came on what was the number of the trouble code?

Jan 24, 2012 | 2002 Pontiac Grand Prix

1 Answer

2007 Pontiac Grand Prix GXP Sedan wheel bearing problems - computer says it bad put a new one in and computer still says it bad


You car has a Powertrain Control Module or Electronic
Control Module --- not a computer

No Motor vehicle self diagnoses themselves or
says anything is bad

All it can do, is set an OBD2 Trouble Code --if a sensor
goes out of range.

You have to use the codes to diagnose a particular
system & component test what you think may be a
problem

There is a lot monitored & data stored you won't see,
unless you access the ecm with a scan tool,not a code reader

Jul 19, 2011 | 2007 Pontiac Grand Prix GXP Sedan

1 Answer

How do you repair P0446 trouble code on a 2000 pontiac grand prix gtp?


P0446 - Evaporative Emmission Control System Vent Control Circuit
Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test.

Symptoms: There will be no obvious symptoms to driver, other than MIL illumination.

Causes: A code P0446 could mean one or more of the following has happened:
* Faulty vent valve
* Open, short or excessive resistance on Vent valve control circuit
* Blockage of vent valve
* Bad PCM

Possible Solutions: With a P0446 OBD-II trouble code, here are some things to try:
* Replace Vent valve
* Repair open, short, or resistance problem in control circuit
* Repair open, or short, or resistance problem in power circuit
* Replace PCM


Review this information, Test it and tell us news.

Feb 15, 2011 | 2000 Pontiac Grand Prix

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