Question about 2006 Pontiac Grand Prix
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!
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
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
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
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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