What does code P0340 mean on a Ford and is it safe to drive?
P0340: Camshaft Position Sensor Circuit Malfunction. Here's what it means on your Ford, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
What this code means
The PCM is not receiving a valid signal from the camshaft position sensor. Affects ignition timing and fuel injection.
Common causes for your Ford
- Failed camshaft position sensor
- Wiring or connector issue
- Timing chain/belt misalignment (less common)
Symptoms
- Check Engine Light
- No start or hard start
- Rough run, stalling
- Reduced power
Typical fixes
- Replace camshaft position sensor
- Repair wiring/connector
- Verify timing if sensor replacement doesn't fix
Repair cost range
For a Ford, repairs for P0340 often fall between $100 and $500, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Ford
Ford P0340 on the 3-valve 5.4L Triton and 4.6L is often a failed CMP sensor or a variable cam timing phaser issue. On 3-valve engines, debris from failed cam phasers can damage the sensor—inspect for metal debris and timing component damage if the sensor alone doesn't resolve it.
Most commonly affected models