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Home › Pontiac › 1996 › Trans Sport › Repair and Diagnosis › Engine Performance › System › Engine Control System - Tests W/Codes › Diagnostic Trouble Codes › DTC P0121 - TP Sensor System Performance › Conditions required to set DTC are:

Conditions required to set DTC are:

Engine running and throttle steady.
No MAP or TP sensor DTCs are set
Predicted TP ANGLE not close to actual TP ANGLE.
Above conditions present more than 10 seconds.