DTC P2123-00: App Sensor No. 1 Circuit High Input: Notes
DTC P2123:00 DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P2123:00 |
APP sensor No. 1 circuit high input |
| DETECTION CONDITION |
- The PCM monitors the input voltage from APP sensor No. 1. If the input voltage at the PCM terminal 2AN is above 4.9 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 check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA/Snapshot data is available.
- DTC is stored in the PCM memory.
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| FAIL-SAFE FUNCTION |
- Regulates the upper limit of the APP sensor output.
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| POSSIBLE CAUSE |
- APP sensor connector or terminals malfunction
- PCM connector or terminals malfunction
- APP sensor No. 1 malfunction
- Short to power supply in wiring harness between APP sensor terminal B and PCM terminal 2AN
- Open circuit in wiring harness between APP sensor terminal C and PCM terminal 2AO
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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CAUTION:
- Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.