OBD-II code · Powertrain (generic)
P0392 Camshaft Position Sensor B Circuit Low (Bank 2)
Cam sensor B on bank 2 below lower plausibility — short to ground. The camshaft position sensor identifies which cylinder is on the compression stroke — without it the ECM cannot run sequential injection or coil-on-plug ignition correctly.
Is it safe to drive with P0392?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyShort to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Camshaft Position Sensor
Related codes
- P0347Camshaft Position Sensor A Circuit Low (Bank 2)
- P0367Camshaft Position Sensor B Circuit Low (Bank 1)
- P0390Camshaft Position Sensor B Circuit (Bank 2)
- P038FIgnition J Control Signal Circuit High
- P0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2)
- P0393Camshaft Position Sensor B Circuit High (Bank 2)
- P0394Camshaft Position Sensor B Circuit Intermittent (Bank 2)
- P0395Cylinder 1 Pressure Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.