Home/Pontiac/Firebird/Pontiac Firebird IV (1993-2002)/Repair manual/Testing & Diagnostics/DTC P0123 - TP SENSOR CIRCUIT HIGH VOLTAGE

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DTC P0123 - TP SENSOR CIRCUIT HIGH VOLTAGE Pontiac Firebird IV

Testing & Diagnostics

Note. For circuit reference, see the appropriate WIRING DIAGRAMS article. For connector and terminal identification, see CONNECTOR IDENTIFICATION .

Circuit Description

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

Engine running.
TP sensor signal voltage greater than 4.71 volts.
Conditions present for longer than one second.