Check Engine Code
P0021
"A" Camshaft Position — Timing Over-Advanced (Bank 2)
Severity: medium
DIY difficulty: 2/5
Typical cost: $0–$500
What P0021 means
Bank 2 twin of P0011. Intake cam over-advanced on the Bank 2 cylinder bank.
Symptoms
- CEL
- Rough idle
- Power loss
Likely causes (most common first)
- Dirty/low engine oil
- Failed VVT solenoid (Bank 2)
- Worn phaser
- Stretched timing chain
Can I keep driving?
Medium — drivable but fix soon
Typical repair cost
DIY fixes can start near $0 (parts only). Shop repairs for P0021 typically run up to $500 depending on the underlying cause and vehicle. Start with the most common cause — Dirty/low engine oil — before throwing parts at it.
Recommended parts & tools for P0021
Our buyer’s guides cover the tools and parts that pair with AXLY:
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