DTC P0123-00: TP Sensor No. 1 Circuit High Input: Notes

DTC P0123:00 DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0123:00	TP sensor No. 1 circuit high input
DETECTION CONDITION	If the PCM detects the TP sensor No. 1 voltage is to be above 4.85 V, PCM determines that the TP sensor No. 1 circuit has a malfunction. Diagnostic support note This is a continuous monitor (CCM). The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. The DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Regulates the upper limit of the APP sensor output.
POSSIBLE CAUSE	Throttle body connector or terminals malfunction PCM connector or terminals malfunction Short to power supply in wiring harness between throttle body terminal A and PCM terminal 2AK TP sensor No. 1 power supply circuit and signal circuit are shorted to each other Open circuit in wiring harness between the following terminals: Throttle body terminal A-PCM terminal 2AK Throttle body terminal D-PCM terminal 2AN TP sensor No. 1 malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.