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Home >> Oldsmobile >> 1997 >> Regency >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (Engine Control Systems Tests W/Codes) >> Diagnostic Trouble Codes >> DTC P0121 - TP Sensor System Performance >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 1998 Pontiac Bonneville, 1998 Oldsmobile Regency, 1998 Oldsmobile LSS, 1998 Oldsmobile Eighty-Eight, and 1998 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.

Throttle Position (TP) sensor measures amount of throttle opening. PCM uses TP sensor information for fuel delivery calculations. TP sensor readings during acceleration are much higher than those during deceleration or idle.

Conditions required to set DTC are: