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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Engine Controls - Self-Diagnostics - 4.0L) >> Diagnostic Tests >> DTC P0121: Throttle Position Sensor Circuit Insufficient Activity >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

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

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