OBD
P0021
A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)
What it means
P0021 means A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2).
Check these first
- Stuck or sluggish bank 2 VVT oil control valve
- Gummed-up intake phaser
- Low or dirty engine oil
- Timing chain stretch
What to do next
- Verify oil level, condition, and pressure
- Compare commanded vs actual bank 2 cam position
- Clean or replace the oil control valve
- Inspect the phaser and timing chain
- Replace worn components and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-08-30.