Question about 2004 Pontiac Grand Prix

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My 2004 Pontiac Grand Prix barely moves!!!!

My cars Service Traction System and Reduced Engine Power Light came on at the same time and the car will not accelerate and it hesitates when starting back up from a complete stop.

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  • Anonymous Mar 16, 2014

    1995 Firebird 3.4 LTR, Automatic. Stepson advised that the car had a coolant smell and was dying at stop signs. Found and replaced bad pump and Crankshaft position sensor. Now car barely starts (ether helps), hesitates BADLY when trying to accelerate, and when starting from a cold start, will idle fairly normal up to operating temp, then idle will jump to 1500-2500 RPM. No Service engine light is on.

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Have you ever had the catalytic converter changed. Over time the pellets inside will melt together and this will make the care very very sluggish like it does not want to run. You may want to try that.

Posted on Jul 06, 2009

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What causes the "Reduced Engine Power", "Service Stability Control" and "Traction Control" warning lights to come on?


the "Reduced Engine Power", problem causes the PCM to disable "Service Stability Control" and "Traction Control" turning on the warning lights to come on for those systems . The reduced engine power is because of a problem with the electronic throttle control system or as GM calls it TAC system . Reduced Engine Power Mode
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The PCM will continue to use the accelerator pedal for throttle control, however, the vehicle acceleration is limited.
• Limited throttle mode--The PCM will continue to use the accelerator pedal for throttle control, however, the maximum throttle opening is limited.
• Throttle default mode--The PCM will turn OFF the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The PCM will perform the following actions:
- Limit engine speed to idle by positioning the TP, or by controlling the fuel and spark if the throttle is turned OFF.
- Ignore the accelerator pedal input.
• Engine shutdown mode--The PCM will disable fuel and de-energize the throttle actuator.
© 2017 General Motors Corporation. All rights reserved.



Drive by Wire training Your best bet , take it to a GM dealer

Mar 04, 2017 | 2005 Pontiac Grand Prix GT

1 Answer

What does it mean when the "Reduced Engine Power", "Service Stability System" and "Traction Control" warning lights come on?


You may have to have the harness replaced. Be sure the connector innards stay dry.When they get wet the contacts will oxidize and start shorting to each other and also the oxide is an insulator causing connections to open. Good Luck, I had a water problem with a Ford Flex and even though covered under warranty since I was the second owner they would not honor it. It cost me about three grand so price things out before getting it fixed, the car may not be worth the investment.

Aug 24, 2014 | 2005 Pontiac Grand Prix GTP

2 Answers

Vehicle wont start reduced power engine light comes on


run fault codes to determine the failing sensor.

Jan 08, 2014 | 2004 Pontiac Grand Prix

1 Answer

My 2004 pontiac grand prix gtp has twice now thrown reduced engine power across my dash and acts like it cant get any gas and comes to a stop. Does anyone know what this might be the first time I figured...


Have the fault codes read as a reduce power message means that something is wrong either in the engine or the gear box. check oil and coolant levels and treat the message seriously as it is intending to stop costly damage

Jan 07, 2014 | 2004 Pontiac Grand Prix GT2

2 Answers

Throttle position sensor 06 grandprix gt


O2 sensors can cause this and often they clear up after a good run.

Nov 20, 2013 | 2006 Pontiac Grand Prix

1 Answer

2007 grand prix traction control


hey guys, im going through the exact same thing with my 2004 pontiac grand prix. and i did my research and found a recall that described these issues. I contacted pontiac about this and they advised me to take the car to get a diagnois to make sure its a problem that relates to the recall and they will reimburse me the money it costed to get the dx and pay full cost for the problem. below im going to copy and paste all of the recall info. Hope this helps for all of us

Recall ID # 51199 - SERVICE BRAKES, HYDRAULIC

Hide Details



Recall Date:

JUN 23, 2004

Model Affected:

2004 Pontiac Grand Prix

Summary:

CERTAIN PASSENGER VEHICLES WERE PRODUCED WITH LOWER THAN SPECIFIED TORQUE ON BOTH FRONT BRAKE CALIPER TO STEERING KNUCKLE ATTACHMENT BOLTS. WITH IMPROPER TORQUE, THE CLAMP LOAD AT THE JOINT MAY NOT BE ADEQUATE TO PREVENT MOVEMENT BETWEEN THE CALIPER BRACKET AND KNUCKLE.

Consequences:

DEPENDING ON WHETHER ONE OR BOTH BOLTS BACKS OUT OR FRACTURES, THE RESULT CAN BE LOCKING OF THE AFFECTED WHEEL DURING BRAKING AND AN ABRUPT STEERING INPUT IN THE DIRECTION OF THE LOCKED WHEEL, REDUCED BRAKING AND NOISE FROM THE AFFECTED WHEEL, OR SEVERING OF A BRAKE HOSE, INCREASED BRAKE PEDAL TRAVEL, AND REDUCED STEERING CONTROL. REDUCED BRAKING OR STEERING CONTROL COULD CAUSE A CRASH.

Remedy:

DEALERS ARE TO TIGHTEN BOTH BOLTS TO THE SPECIFIED TORQUE. OWNER NOTIFICATION BEGAN ON JUNE 28, 2004. OWNERS SHOULD CONTACT CHEVROLET 1-800-630-2438 OR PONTIAC 1-800-620-7668.

Potential Units Affected:

47991
-----------------------------------------------------------------

Original Launch X431 Master

Mar 15, 2013 | Pontiac Grand Prix Cars & Trucks

1 Answer

SERVICE TRACTION CONTROL


a bad reading from a wheel speed sensor will cause the problem you need a scan toll to see what one is bad they also had a problem with the harness connectors so using a scan tool makes it a must

Oct 01, 2012 | 2004 Pontiac Grand Prix

2 Answers

2004 grand prix no go with traction control light on.


I had the same problem with my car. I cleaned the throttle body and when i installed everything back, the car would throw 2 OBD codes: P0120 at start up and P0507 when it stalled at a red light. Took it to the dealership and they had to install a new throttle body because the throttle position sensor is internal. Cost = $718.00 out the door. Part is about $480 and labor is 1.8 hours at $99.00/hr (bunch of ****). There is only a 12 month/12,000 mile warranty for work from the dealer so I would recommend doing the work yourself if possible. There is only 2 bolts on top, 2 nuts on bottom, 1 electrical connection, and 1 hose clamp.

Feb 12, 2010 | 2004 Pontiac Grand Prix

1 Answer

Service variable effort steering warning is coming on.what do i do to service it? 2004 gtp


i have an ABS, Traction Control, and Variable Steering warning lights come on right after i put the car in drive and move forward.
2005 Pontiac Grand Prix

Aug 15, 2009 | 2004 Pontiac Grand Prix

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