Intake Camshaft Position Actuator Circuit / Open (Bank 2)
What does P0020 mean?
The P0020 code means the vehicle's onboard diagnostic system has detected: Intake Camshaft Position Actuator Circuit / Open (Bank 2). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Rough or unstable idle
- Reduced engine power
- Poor fuel economy
- Engine may stall at low speeds
Probable Causes (Ranked by Likelihood)
- Faulty intake VVT solenoid (bank 2) Very High
- Wiring issue -- open or short in VVT solenoid circuit High
- Corroded or damaged connector at VVT solenoid Moderate
- Low or dirty engine oil restricting solenoid operation Moderate
- ECM/PCM internal fault Low
Step-by-Step Diagnostic Procedure
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Check engine oil level and condition. Low or dirty oil can cause VVT solenoid screens to clog.
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Locate the intake VVT solenoid on bank 2. Disconnect the connector and measure solenoid resistance with a multimeter (typically 6-13 ohms). Out of range indicates a failed solenoid.
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With the solenoid disconnected, check for 12V power and ground at the connector using a test light or multimeter when commanded on by a scan tool.
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Inspect the wiring harness between the PCM and VVT solenoid for chafing, breaks, or shorts. Pay attention to areas near hot exhaust components.
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Remove the VVT solenoid and inspect the oil screen for debris or sludge. Clean or replace as needed.
Frequently Asked Questions
Can I drive with code P0020?
You can drive short distances, but the engine will likely run rough and have reduced power since the VVT system on bank 2 is not functioning properly. Get it repaired within a few days to avoid excess wear.
What is a VVT solenoid actuator circuit?
The VVT (Variable Valve Timing) solenoid actuator circuit includes the solenoid, its wiring, connector, and the PCM driver. The PCM controls oil flow to the camshaft phaser by energizing the solenoid. An open circuit means there is a break somewhere preventing current flow.
How do I find bank 2 on my engine?
Bank 2 is the side of the engine opposite cylinder number 1. On most V6 and V8 engines, bank 1 is the side with cylinder 1 (often the driver side), and bank 2 is the opposite side. Check your service manual for your specific vehicle.