Question about 2006 Pontiac Grand Prix

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HELP!! Many codes..

My car has a problem with the engine light and the Reduced Engine Power lights. Today I took it to P0128, P0171, P1125, P1516, P2125, P2138, and U0107. The car has a new gas cap, a new accelerator, I have tried a new throttle body -that did not work either. ANY help would be appreciated!

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  • rem1978 Jun 03, 2014

    I've replaced the throttle body again. New accelerator about a year ago. New gas cap. Have spent close to $1,000 trying to track this problem down. Any ideas?

  • Bogdan Odwazny
    Bogdan Odwazny Jun 04, 2014

    Did you replaced thermostat ,coolant sensor,temperature intake sensor,air filter,put some fuel celan

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  • Pontiac Master
  • 5,645 Answers

Check coolant level and strength ,thermostat,coolant sensor and temperature sensor,171 dirty fuel filter,dirty MAF sensor,bank 1 sensor 1 O2,PVC valve,vaccum leak,exhaust ,you can try smok test.

Posted on May 06, 2014

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Posted on Jan 02, 2017

motor1258
  • 6674 Answers

SOURCE: reduced engine power signal throwing out codes

There is a GM service bulletin on this particular item. basically covers both codes your getting.
#07-06-04-019A: Intermittent MIL/SES, DTC P2138 with Reduced Engine Power (Repair Instrument Panel (IP) to Body Harness Connector)

Models: 2005-2008 GM Passenger Cars and Light Duty Trucks (Including Saturn)

Posted on Jul 03, 2009

  • 1 Answer

SOURCE: 2004 grand prix no go with traction control light on.

My car is doing exact same thing! I flushed radiator and now I have traction control light, reduce engine power, and enigine light coming on! My car sounds like **** and won't idle and no power! 04 prix gt of course. It was fine until I flushed radiator and put new thermostat in! What do I do?

Posted on Sep 14, 2011

  • 7 Answers

SOURCE: I have a Pontiac G3 2009. The check engine light

try replacing the o2 (oxygen) sensors on the exhaust pipes. there should be at least 2 of them.
if that does not work then your next option would be to have the catalytic converter inspected to see if it is plugged. (poor acceleration)

Posted on Sep 20, 2013

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1 Answer

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Here is the definition of the code.

Possible causes - Faulty Throttle Actuator Control (TAC) module
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#07-06-04-019A: Intermittent MIL/SES, DTC P2138 with Reduced Engine Power (Repair Instrument Panel (IP) to Body Harness Connector)

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My name is Juan Heredia and I'm an ASE certified technician. I have seen this code and this driveability issues before, I will need a little more information about your car to tell you exactly what your problem is, Honda has two different types of throttle bodies for this especific vehicle, drive by wire and cable operated, if your vehicle uses the drive by wire type I would highly recommend to replace the throttle body actuator, if it uses the cable operated one it will be necesary to do a little more testing, let me know if this helps

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