DTC P2123:00 [L5]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSES

DTC P2123:00	APP sensor No. 1 circuit high input
DETECTION CONDITION	The PCM monitors the input voltage from APP sensor No. 1 when the engine is running. If the input voltage is above 4.8 V , the PCM determines that the APP sensor No. 1 circuit input voltage is high. Diagnostic support note This is a continuous monitor (CCM) The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA is available. The DTC is stored in the PCM memory
POSSIBLE CAUSE	APP sensor connector or terminal malfunction PCM connector or terminal malfunction Short to power supply in wiring harness between APP sensor terminal E and PCM terminal 1AO APP sensor No 1 malfunction Open circuit in wiring harness between APP sensor terminal D and PCM terminal 1AS PCM malfunction
Courtesy of MAZDA MOTORS CORP.

DTC P2123:00

APP sensor No. 1 circuit high input

DETECTION CONDITION

The PCM monitors the input voltage from APP sensor No. 1 when the engine is running. If the input voltage is above 4.8 V , the PCM determines that the APP sensor No. 1 circuit input voltage is high.

Diagnostic support note

This is a continuous monitor (CCM)
The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory

POSSIBLE CAUSE

APP sensor connector or terminal malfunction
PCM connector or terminal malfunction
Short to power supply in wiring harness between APP sensor terminal E and PCM terminal 1AO
APP sensor No 1 malfunction
Open circuit in wiring harness between APP sensor terminal D and PCM terminal 1AS
PCM malfunction

Courtesy of MAZDA MOTORS CORP.