P0023 Code – "B" Camshaft Position Actuator Circuit/Open (Bank 2)
The P0023 diagnostic trouble code (DTC) is a generic OBD-II powertrain code that indicates the engine control module (ECM) has detected an electrical fault in the exhaust camshaft position actuator control circuit on Bank 2. This code is commonly caused by a faulty Variable Valve Timing (VVT) oil control solenoid, damaged wiring, poor electrical connections, or, in rare cases, an ECM fault.
What Does P0023 Mean?
P0023 stands for "B" Camshaft Position Actuator Circuit/Open (Bank 2). It means the ECM has detected an open circuit or electrical malfunction in the exhaust camshaft actuator control circuit for Bank 2.
Symptoms of P0023
- Check Engine Light illuminated.
- Reduced engine performance.
- Rough idle.
- Poor acceleration.
- Engine hesitation.
- Increased fuel consumption.
- Possible hard starting.
Common Causes
- Faulty exhaust VVT oil control solenoid.
- Open or shorted wiring in the actuator circuit.
- Loose, damaged, or corroded electrical connector.
- Low or contaminated engine oil.
- Faulty ECM (rare).
How to Diagnose P0023
- Scan for additional diagnostic trouble codes.
- Inspect the VVT solenoid connector and wiring.
- Measure the VVT solenoid resistance.
- Verify battery voltage and ECM control signal.
- Check engine oil level and condition.
- Test the VVT solenoid operation.
How to Fix P0023
- Replace the faulty VVT oil control solenoid.
- Repair damaged wiring or electrical connectors.
- Clean corroded connector terminals.
- Replace contaminated engine oil and filter.
- Replace or reprogram the ECM if necessary.
Estimated Repair Cost
- Oil and filter change: $40–$120
- VVT oil control solenoid replacement: $150–$400
- Wiring repair: $50–$250
- ECM replacement/programming: $500–$2,000+
Note: Repair costs vary depending on the vehicle manufacturer, engine type, labor rates, and geographic location.
Related Diagnostic Trouble Codes
- P0020
- P0021
- P0022
- P0024
- P0025
Can You Drive with P0023?
Although the vehicle may still be drivable, it is not recommended to ignore code P0023. A faulty VVT actuator circuit can reduce engine performance, increase emissions, and may lead to additional engine problems if left unrepaired.
Conclusion
P0023 indicates an electrical fault in the exhaust camshaft actuator control circuit on Bank 2. The issue is most commonly caused by a failed VVT oil control solenoid, damaged wiring, or poor electrical connections. Early diagnosis and repair will help restore proper VVT operation and engine performance.