P0020 Code – "A" Camshaft Position Actuator Circuit/Open (Bank 2)
The P0020 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 intake camshaft position actuator control circuit on Bank 2. This code is commonly caused by a faulty Variable Valve Timing (VVT) solenoid, damaged wiring, poor electrical connections, or less commonly an ECM failure.
What Does P0020 Mean?
P0020 stands for "A" Camshaft Position Actuator Circuit/Open (Bank 2). It means the ECM has detected an open circuit or electrical malfunction in the intake camshaft actuator control circuit for Bank 2.
Symptoms of P0020
- Check Engine Light illuminated.
- Reduced engine performance.
- Rough idle.
- Poor acceleration.
- Engine hesitation.
- Increased fuel consumption.
- Possible hard starting.
Common Causes
- Faulty intake VVT oil control solenoid.
- Open or shorted actuator wiring.
- Loose or corroded electrical connector.
- Low or contaminated engine oil.
- Faulty ECM (rare).
How to Diagnose P0020
- 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 P0020
- Replace the faulty VVT oil control solenoid.
- Repair damaged wiring or connectors.
- Clean corroded electrical terminals.
- Change contaminated engine oil and filter.
- Replace the ECM if all other tests confirm failure.
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 model, engine type, labor rates, and country.
Related Diagnostic Trouble Codes
- P0021
- P0022
- P0023
- P0024
- P0025
Can You Drive with P0020?
Although the vehicle may still be drivable, it is not recommended to ignore code P0020. A malfunctioning VVT actuator circuit can reduce engine performance, increase emissions, and lead to additional engine problems if left unrepaired.
Conclusion
P0020 indicates an electrical fault in the intake camshaft actuator control circuit on Bank 2. The problem is most commonly caused by a faulty VVT solenoid, damaged wiring, or poor electrical connections. Prompt diagnosis and repair will help restore normal engine performance.