P1377
Ignition Control Module Cam Ref Pulse To 4X Ref Pulse Incorrect
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$13–89 (est.)
Symptoms
- Unstable engine operation
- Reduced engine power
- Increased fuel consumption
- Difficulty starting the engine
- Check engine light is on
Causes
- Camshaft position sensor malfunction
- Problems with the crankshaft sensor
- Ignition module malfunction
- Damage to wiring or connectors
- Timing belt/chain problems (stretching or jumping)
How to Fix
- Check the camshaft position sensor and its wiring
- Check the crankshaft sensor and its wiring
- Check the ignition module
- Check the condition of the timing belt/chain
- If necessary, replace faulty components