Diagnostic Aids

Inspect for the following conditions:

• A skewed MAP sensor. A skewed MAP signal may cause the PCM to incorrectly determine that the TP sensor is out of range. Inspect for an unusually low or unusually high MAP reading.
• If the DTC is determined to be intermittent, or the TP sensor system is still suspect, see DTC P1121: TP SENSOR CIRCUIT - INTERMITTENT HIGH VOLTAGE  and INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM.