Intake Camshaft Position Timing Over-Retarded (Bank 2)
What does P0022 mean?
The P0022 code means the vehicle's onboard diagnostic system has detected: Intake Camshaft Position Timing Over-Retarded (Bank 2). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Rough or unstable idle
- Loss of engine power, especially at higher RPMs
- Increased fuel consumption
- Engine may stall when coming to a stop
Probable Causes (Ranked by Likelihood)
- Low or contaminated engine oil Very High
- Faulty intake VVT solenoid on bank 2 High
- Clogged oil passages to the bank 2 intake camshaft phaser Moderate
- Worn or stuck camshaft phaser Moderate
- Stretched timing chain causing retarded cam position Low
Step-by-Step Diagnostic Procedure
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Check engine oil level and quality. If the oil is dark, thick, or low, perform an oil change with the correct viscosity and clear codes to see if the issue returns.
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With a scan tool, monitor bank 2 intake camshaft position at idle and 2,500 RPM. The actual position should be within 3-5 degrees of the desired position.
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Remove and inspect the bank 2 intake VVT solenoid. Clean or replace if the oil screen is clogged. Test resistance (6-13 ohms typical).
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Command the VVT solenoid on and off with a scan tool while watching cam position. If the position does not change, the phaser may be stuck or oil passages blocked.
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If other causes are ruled out, inspect the timing chain for stretch and the chain tensioner for proper operation.
Frequently Asked Questions
Can I drive with code P0022?
You can drive short distances at moderate speeds. The engine will have reduced power since the intake camshaft is stuck in a retarded position. Have it diagnosed soon to prevent further engine wear.
What causes the camshaft to be over-retarded?
The camshaft remains in its default retarded position when the VVT system cannot advance it. This is usually caused by low oil pressure, a clogged VVT solenoid, or blocked oil passages preventing hydraulic pressure from reaching the phaser.
How do I know if it is the solenoid or the phaser?
Test the solenoid first since it is cheaper and easier to access. If the solenoid tests good electrically and the oil screen is clean, but commanding it does not change cam position on the scan tool, the phaser itself is likely stuck or worn.