Subaru Error Code P0021: How to Fix It

Q: Can I drive with Subaru error code P0021?

You should avoid driving with P0021 as it indicates incorrect camshaft timing that can cause engine damage. If you must drive, do so gently and get it repaired immediately.

Q: How much does it cost to fix Subaru P0021?

DIY repair costs $50-150 for a new AVCS solenoid. Professional repair typically costs $200-400 including labor. More complex timing issues can cost $800-1500.

Q: What causes Subaru P0021 error code?

Common causes include faulty AVCS solenoid, dirty engine oil, clogged solenoid screen filter, wiring issues, or internal engine timing problems.

Q: Will P0021 cause my Subaru to fail emissions test?

Yes, P0021 will likely cause your vehicle to fail emissions testing as it affects engine timing and combustion efficiency.

Q: How do I prevent Subaru P0021 from happening again?

Maintain regular oil changes with high-quality oil, replace oil filters as scheduled, and address any oil leaks promptly to keep the AVCS system functioning properly.

Abstract

Subaru error code P0021 indicates that the intake camshaft position timing is over-advanced on Bank 2, typically caused by a faulty AVCS (Active Valve Control System) solenoid. This timing issue can lead to poor engine performance, reduced fuel economy, and potential engine damage if left unaddressed.