OBD2 Automotive Error Code P0021: How to Fix It

Q: What causes OBD2 error code P0021?

P0021 is typically caused by a faulty camshaft position sensor, dirty engine oil, a malfunctioning VVT solenoid, stretched timing chain, or wiring issues in the camshaft timing system.

Q: Can I drive with error code P0021?

While you may be able to drive short distances, P0021 can cause engine performance issues and potential damage. Address this code promptly to prevent costly engine repairs.

Q: How much does it cost to fix P0021?

Repair costs vary widely depending on the root cause. Simple fixes like oil changes cost $30-80, sensor replacement runs $100-300, while timing chain replacement can cost $1,000-3,000.

Q: Will P0021 cause my car to fail emissions testing?

Yes, P0021 will typically cause your vehicle to fail emissions testing as it indicates a problem with the engine's timing system that affects performance and emissions.

Abstract

OBD2 error code P0021 indicates the intake camshaft position timing is over-advanced on Bank 2 of your engine. This timing issue can cause poor performance, rough idling, and potential engine damage if left unaddressed.