DTC P0340: Camshaft Position (CMP) Sensor A No Signal (2014 2015)
General Description
Camshaft position (CMP) sensor A detects the intake camshaft timing and sends pulsing signals to the powertrain control module (PCM). The PCM determines the advance or the retard of the camshaft timing according to the signals from the crankshaft position (CKP) sensor and CMP sensor A. If no pulsing signals are detected from CMP sensor A, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | - |
| DTC Type | Two drive cycles, MIL on |
| OBD Status | PASSED/ FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | |
|---|---|
| State of the engine | Running |
| No active DTCs set (prevents monitor from running) | P0335, P0339, P0344 |
Malfunction Threshold
No input signals from CMP sensor A are detected at least 25 times in succession.
Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- CMP sensor A CAM line short to ground
- CMP sensor A CAM line open
- CMP sensor A failure
- PCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.