Exhaust Camshaft Position Actuator Circuit / Open (Bank 2)
What does P0023 mean?
The P0023 code means the vehicle's onboard diagnostic system has detected: Exhaust Camshaft Position Actuator Circuit / Open (Bank 2). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Rough or erratic idle
- Reduced engine power and throttle response
- Poor fuel economy
- Possible engine hesitation during acceleration
Probable Causes (Ranked by Likelihood)
- Failed exhaust VVT solenoid (bank 2) Very High
- Open or shorted wiring in VVT solenoid circuit High
- Corroded or damaged connector at the solenoid Moderate
- Low or dirty engine oil affecting solenoid operation Moderate
- PCM driver circuit failure Low
Step-by-Step Diagnostic Procedure
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Check engine oil level and condition. Low or sludgy oil can clog the VVT solenoid screen and affect performance.
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Locate the bank 2 exhaust VVT solenoid. Disconnect the electrical connector and measure solenoid resistance (6-13 ohms typical). Replace if out of specification.
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With the solenoid disconnected, use a multimeter to check for battery voltage and proper ground at the harness connector when the PCM commands the solenoid on.
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Inspect the wiring harness from the PCM to the solenoid for chafing, breaks, or shorts. Check for heat damage near exhaust components.
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Remove the solenoid and inspect the oil screen for sludge or metal debris. Clean the screen or replace the solenoid.
Frequently Asked Questions
Can I drive with code P0023?
Yes, you can drive short distances. The exhaust camshaft on bank 2 will remain in its default position, causing reduced power and efficiency but no immediate risk of engine damage.
What is the difference between P0013 and P0023?
P0013 is the exhaust camshaft actuator circuit code for bank 1, while P0023 is the same circuit code for bank 2. They indicate the same type of fault but on opposite sides of a V-configuration engine.
Can I replace the VVT solenoid myself?
Yes, VVT solenoid replacement is a moderate DIY job on many vehicles. The solenoid is usually held in with one bolt and an electrical connector. The main challenge is accessing it, which varies by vehicle. Budget about 30-60 minutes.