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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.