P0344
PowertrainCrankshaft Camshaft Positionhigh severityCamshaft Position Sensor A Circuit Intermittent (Bank 1 or Single Sensor)
What P0344 Means
The camshaft position sensor signal is intermittent on bank 1. This can cause stalling, hard starts, and cam/crank correlation issues.
Symptoms
- Intermittent stalling
- Hard starting
- Rough running
Common Causes
- Loose CMP connector
- Intermittent wiring fault
- Failing camshaft sensor
- Damaged reluctor/tone wheel
Diagnostic Steps
- Scope CMP signal under vibration
- Wiggle-test sensor harness
- Inspect connector for corrosion
- Check tone wheel and air gap
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