DTC P2128: Notes
DTC P2128 [L3] DETECTION CONDITIONS AND POSSIBLE CAUSES
| DTC P2128 |
Accelerator pedal position (APP) sensor No. 2 circuit high input |
| DETECTION CONDITION |
- The PCM monitors the input voltage from APP sensor No. 2 when the engine is running. If the input voltage is above 7.2 V
for 1s
, the PCM determines that the APP sensor No. 2 circuit has malfunction.
Diagnostic support note
- This is a continuous monitor (CCM).
- MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA (Mode 2/Mode12) is available.
- The DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- APP sensor connector or terminal malfunction
- Short to power supply in wiring harness between APP sensor terminal E and PCM terminal 1 AO
- APP sensor No. 2 malfunction
- PCM connector or terminal malfunction
- Open circuit in wiring harness between APP sensor terminal D and body ground
- Open circuit in wiring harness between APP sensor terminal E and PCM terminal 1AO
- Open circuit in wiring harness between APP sensor terminal F and main relay
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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