Service Engine Soon Light And DTC P1125 P2101 P2120 P2125 Or P2138 - keywords 3.8 body hesitation L26 MIL mode PCM power reduced SES throttle

This PI was superseded to advise contact BQM or engineering. Please discard PIP4343B.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Some customers may comment that the Service Engine Soon light is illuminated. In addition some may also comment that the vehicle was exhibiting a hesitation and/or had the "reduced power mode" symbol or message displayed. When checking for diagnostic Trouble Codes (DTC) in the Powertrain Control Module (PCM), codes P1125, P2120, P2125 or P2138 may be found.

Grand Prix / LaCrosse / Allure Models:

Using a small pocket size screwdriver carefully reposition the red sealing material for the wires from connector X101 located on the left strut tower. With the sealing material out of the way, inspect for the presence of water inside. If water or evidence of moisture is found, then contact Jim Kelly at (586) 492-5612. If water or evidence of moisture is NOT found, then clear the DTC's and road test the vehicle to see if any of the DTC's will reset.

Metro Detroit Dealers:

Engineering is looking for a vehicle in the "Metro Detroit" (Southeast Michigan) area that sets the DTC's listed with no water found in connector X101 or AFTER all the water has been removed from the connector. Dealers in the "Metro Detroit" area that have a vehicle with this concern should contact Jim Kelly at (586) 492-5612 or Ray Mueller at (248) 685-4254 BEFORE PERFORMING ANY FURTHER DIAGNOSIS. Jim or Ray will assist in making arrangements for Engineering to review the vehicle at your Metro Detroit area location.

All Other Dealers:

Continue with your diagnosis using the information in SI and make repairs as necessary. If your diagnosis leads you to replacing the throttle body assembly, then contact Jim Kelly (586) 492-512. He will obtain the necessary information from you and will give you information on where to mail the old throttle body assembly to.

Lucerne Models:

Clear the DTC's and road test the vehicle to see if any of the DTC's will reset.

Metro Detroit Dealers:

Engineering is looking for a vehicle in the "Metro Detroit" (Southeast Michigan) area where any of the listed DTC's will reset during a road test. Dealers in the "Metro Detroit" area that have a vehicle with this concern should contact Jim Kelly at (586) 492-5612 or Ray Mueller at (248) 685-4254 BEFORE PERFORMING ANY FURTHER DIAGNOSIS. Jim or Ray will assist in making arrangements for Engineering to review the vehicle at your Metro Detroit area location. If the DTC's will not reset, continue with you diagnosis using the information in SI and make repairs as necessary.

All Other Dealers:

Continue with your diagnosis using the information in SI and make repairs as necessary. If your diagnosis leads you to replacing the throttle body assembly, then contact Jim Kelly (586) 492-512. Jim will obtain the necessary information from you and will give you information on where to mail the old throttle body assembly to.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.