OBD-II code · Powertrain (generic)
P0390 Camshaft Position Sensor B Circuit (Bank 2)
A general electrical fault on camshaft position sensor B (typically the exhaust cam) on bank 2 — open, shorted, or out of plausibility. Required for variable valve timing on the exhaust cam.
Is it safe to drive with P0390?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor failed
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
- P0365Camshaft Position Sensor B Circuit (Bank 1)
- P038DIgnition J Control Signal Circuit/Open
- P038EIgnition J Control Signal Circuit Low
- P038FIgnition J Control Signal Circuit High
- P0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2)
- P0392Camshaft Position Sensor B Circuit Low (Bank 2)
- P0393Camshaft Position Sensor B Circuit High (Bank 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.