P0314
DTC P0314: Misfire Detected with Camshaft Position (CMP) Sensor ErrorCircuit Description
The engine control module (ECM) uses information from the crankshaft position (CKP) sensor to determine when an engine misfire is occurring. By monitoring variations in the crankshaft rotation speed for each cylinder, the ECM is able to detect individual misfire events. The camshaft position (CMP) sensor is used to identify which cylinder is misfiring if a majority of the misfire occurs on the same cylinder. If there is a camshaft position (CMP) sensor error, misfire will be detected but the specific cylinder cannot be identified. This DTC detects the unidentified cylinder misfire while the camshaft position (CMP) sensor error is present.
Conditions for Setting the DTC
- The engine is running.
- The ECM detects that the misfire is present with the CMP sensor error.
Action Taken When the DTC Sets
- The Malfunction Indicator Lamp (MIL) will illuminate.
- The ECM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records buffers.
- A history DTC is stored.
Conditions for Clearing the MIL/DTC
- The MIL will turn OFF after four consecutive ignition cycles in which the diagnostic runs without a fault.
- A history DTC will clear after 40 consecutive warm up cycles without a fault.
- The DTC(s) can be cleared by using the scan tool.
Troubleshooting
