P0023"B" Camshaft Position Actuator Circuit (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The engine control module drives the oil control valve (a pulse-width modulated solenoid) of the variable valve timing on the exhaust camshaft on bank 2. It checks the electrical state of this output and sets the code when the circuit is open, or when the measured state does not match the command, for example because of a short. Camshaft adjustment is then disabled and the phaser stays in its locked rest position: the engine keeps running, but with less torque and higher consumption. Bank 2 exists only on V and boxer engines; it is the cylinder bank without cylinder 1.
- What you may notice
- Check engine light on
- Less pulling power at low and medium engine speed
- Rough idle in some engines
- Slightly higher fuel consumption
- Likely causes
- LikelySolenoid coil of the oil control valve open or shorted
- LikelyConnector corroded, loose or soaked with engine oil wicking through the valve
- PossibleWiring harness chafed through or broken
- PossibleSupply voltage missing, e.g. blown fuse
- RareOutput driver in the engine control module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.