With Coolant Control Valve: 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 that the TP sensor No. 1 voltage at the PCM terminal 1O is above 4.9 V, the 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/Snapshot data is available.
- DTC is stored in the PCM memory.
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| FAIL-SAFE FUNCTION |
- Restricts the upper limit of the engine speed.
- PCM restricts engine torque.
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| POSSIBLE CAUSE |
- Throttle body connector or terminals malfunction
- PCM connector or terminals malfunction
- TP sensor No. 1 malfunction
- Short to power supply in wiring harness between throttle body terminal A and PCM terminal 1O
- Open circuit in wiring harness between the following terminals:
- Throttle body terminal B-PCM terminal 1L
- Throttle body terminal A-PCM terminal 1O
- Throttle body terminal D-PCM terminal 1R
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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.