The 6C11-12K073-AC Camshaft Position Sensor (CMP) is an OE component manufactured by Jiangling Motors Corporation for Ford vehicles under the Ford–JMC joint production program. It monitors camshaft position and provides precise signals to the ECU for fuel injection timing and ignition synchronization.
Function in Engine Management
The CMP sensor is critical for:
- Cylinder phase identification during engine start
- Camshaft and crankshaft synchronization
- Sequential fuel injection timing
- Emission control and misfire monitoring
A faulty or distorted CMP signal can trigger fault code P0340, cause rough idle, extended cranking, or reduced engine performance.
Signal Characteristics
- 3-wire Hall-effect sensor
- 5V reference supply, 0–5V digital output
- Factory-calibrated phase alignment
Even minor waveform distortion or phase deviation can cause intermittent synchronization errors. OE calibration ensures signal reliability and ECU compatibility.
Diagnostic Tips
Before replacing the sensor, verify:
- Stable 5V supply and proper ground
- Correct mechanical timing
- Crankshaft sensor signal integrity
- CMP waveform consistency
Replacing the sensor without checking these factors may not resolve synchronization faults.
Common Observations in the Field
- Heat can affect Hall element output → intermittent misfires
- Connector corrosion may reduce signal amplitude
- Mechanical timing drift can cause ECU misinterpretation
Understanding these factors helps technicians avoid misdiagnosis and unnecessary replacements.
OE Reference
- OE Number: 6C11-12K073-AC
- Alternative: 6C1112K073AC
- Cross Reference: U20218230B
Always confirm engine variant or VIN before installation.