Acceleration Control: Notes

1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical or electrical damage.
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the concern is not visually evident, use a fault code reader to retrieve fault codes before proceeding to the Symptom Chart.

DTC P1240, P1241, P1242

Possible Source(s): 

• Accelerator pedal power supply circuit out of range

  Action(s) to take: 

  • GO to Pinpoint Test A.

DTC P1122, P1123, P1215, P1216, P1344

Possible Source(s): 

• Accelerator pedal demand sensor output circuit out of range

  Action(s) to take: 

  • GO to Pinpoint Test B.

DTC P0121,P0122, P0123

Possible Source(s): 

• Throttle position sensor circuit out of range

  Action(s) to take: 

  • GO to Pinpoint Test C.

DTCP1251, P1658, P1631, P1657

Possible Source(s): 

• Throttle motor relay failure

  Action(s) to take: 

  • GO to Pinpoint Test D.

DTC P1243

Possible Source(s): 

• Accelerator pedal demand sensor ground; open circuit

  Action(s) to take: 

  • GO to Pinpoint Test E.

DTC P1611,P1633

Possible Source(s): 

• Engine control module (ECM) failure

  Action(s) to take: 

  • INSTALL a new ECM. For additional information, refer to ELECTRONIC ENGINE CONTROLS - 3.5L/4.2L (2003.5-09) .

DTCP1254, P1250

Possible Source(s): 

• Throttle limp home spring malfunction.

  Action(s) to take: 

  • INSTALL a new throttle body. For additional information refer to ELECTRONIC ENGINE CONTROLS - 3.5L/4.2L (2003.5-09) .