"B" Camshaft Position - Actuator Circuit (Bank 2)
Code P0023 means the PCM has detected an electrical fault in the "B" camshaft position actuator circuit on Bank 2 — the circuit controlling the exhaust cam oil control valve solenoid on Bank 2. This is the Bank 2 exhaust cam electrical equivalent of P0013. The PCM has detected an open, short to ground, or short to voltage in this circuit.
What You Might Notice
- Check engine light on
- Rough idle
- Reduced power
- Poor fuel economy
- Cold-start stumble
Most Common Causes
- 1
Faulty Bank 2 exhaust cam OCV solenoid
The solenoid has an open or shorted coil. Measure resistance and replace if outside the 6–12 ohm typical spec.
- 2
Open or short in Bank 2 exhaust OCV wiring
A broken wire or short in the harness between PCM and the Bank 2 exhaust solenoid sets this code.
- 3
Corroded Bank 2 exhaust OCV connector
Moisture in the connector causes intermittent circuit faults. Inspect and clean before replacing the solenoid.
- 4
Low or dirty oil
Sludge causes the solenoid to draw excess current, leading to circuit faults. Always change oil with solenoid replacement.
How to Diagnose It
- 1
Check Faulty Bank 2 exhaust cam OCV solenoid — The solenoid has an open or shorted coil. Measure resistance and replace if outside the 6–12 ohm typical spec.
- 2
Check Open or short in Bank 2 exhaust OCV wiring — A broken wire or short in the harness between PCM and the Bank 2 exhaust solenoid sets this code.
- 3
Check Corroded Bank 2 exhaust OCV connector — Moisture in the connector causes intermittent circuit faults. Inspect and clean before replacing the solenoid.
- 4
Check Low or dirty oil — Sludge causes the solenoid to draw excess current, leading to circuit faults. Always change oil with solenoid replacement.
How to Fix It
- 1
Change engine oil and filter
Clean oil prevents immediate re-failure of any replacement solenoid.
- 2
Inspect Bank 2 exhaust OCV connector and harness
Check for corrosion and harness damage near the Bank 2 valve cover.
- 3
Test solenoid resistance
Disconnect and measure — replace if open, shorted, or out of spec.
- 4
Replace Bank 2 exhaust cam OCV solenoid
Install OEM or quality replacement, clean bore, and torque to spec.
- 5
Clear codes and verify
Clear DTCs and confirm normal Bank 2 exhaust cam circuit operation with a scanner.
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