P0344Camshaft Position Sensor A Circuit Intermittent Bank 1 or Single Sensor
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0344 means the signal of the intake camshaft sensor of bank 1 (or the only cam sensor) is disturbed for moments: edges are missing or appear at an unexpected angle. Ford checks this on the five-tooth wheel used with variable cam timing; if edges appear where none are expected, Ford sets P0344 and switches cam timing off (loss of power and torque), from 200 rpm, detected within 5 s. In Ford hybrids (C-Max, Fusion, MKZ 2013–2020) moisture in the engine oil from short trips caused P0340 and P0344 – remedy: new sensor and oil change (SSM 48598). FCA asks for the cam/crank synchronisation event data to be saved before replacing a cam sensor. The 2010 Saab 9-5 2.0 diesel uses P0344 differently for too few cam pulses.
- What you may notice
- Check engine light on
- Sporadic loss of power (cam timing off)
- Jerking, rough idle
- Occasionally longer cranking
- Likely causes
- LikelyMoisture or oil inside the sensor, dropping out when hot
- LikelyLoose contact or corrosion at the connector
- PossibleTone wheel on the phaser damaged or loose
- PossibleInterference or chafed wiring
- RareCrankshaft signal disturbed (wrong reference)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €30 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.