Powertrain
generic / SAE
P0340
Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)
The camshaft position (CMP) sensor signal is missing or implausible. The ECU uses CMP together with CKP to identify cylinder phase for sequential injection and coil-on-plug ignition; without CMP the engine may run on group injection or fail to start.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / 40
Possible causes
- Sensor failed high
- Timing chain stretched, throwing off sensor timing medium
- Wiring fault low
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–600 €
- Estimated time: 0.5–4 h
- Component: camshaft position sensor
- Component: timing chain
- Component: timing belt
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012