DTC P0340: Notes
DTC P0340 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES
| DTC P0340 |
Camshaft position (CMP) sensor circuit malfunction |
| DETECTION CONDITION |
- PCM monitors input voltage from CMP sensor when the engine is running. If CMP sensor signal timing inferred from CKP sensor signal has deviated, PCM determines that CMP circuit has malfunction.
Diagnostic support note
- This is a continuous monitor (CCM).
- The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
- PENDING CODE is available if the PCM detects the above malfunction condition.
- FREEZE FRAME DATA is available.
- DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- CMP sensor malfunction
- Connector or terminal malfunction
- CMP sensor is dirty
- Short to ground circuit between CMP sensor terminal A and PCM terminal 28
- Short to ground circuit between CMP sensor terminal B and PCM terminal 2
- Short to power circuit between CMP sensor terminal A to PCM terminal 28
- Short to power circuit between CMP sensor terminal B to PCM terminal 2
- Open circuit between CMP sensor terminal A and PCM terminal 28
- Open circuit between CMP sensor terminal B and PCM terminal 2
- Timing chain misinstallation
- Loose timing chain or improper valve timing
- Loose camshaft sprocket lock bolt
- Loose crankshaft pulley lock bolt
- Both CMP sensor wires are shorted each other
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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