All codes › P0021
P0021: "A" Camshaft Position - Timing Over-Advanced (Bank 2)
What it means
Bank 2 intake cam timing is over-advanced relative to what was commanded (V-engines).
Severity: Medium Bank 2 cam over-advance; rough running on V6/V8s.
Common causes
- Low or dirty oil
- Sticking bank 2 oil control solenoid
- Worn bank 2 phaser
- Timing chain wear
Most common causes first. Exact causes vary by make, model and engine.
Can I fix it myself?
Sometimes DIY. Bank 2 solenoid access varies; oil change first.
Repair cost
SEEDED ESTIMATE Roughly $110–$620
Most likely repair: vvt/oil control solenoid. Diagnosis fees, taxes and other causes are not included.
| Line | Low | High | Basis |
|---|---|---|---|
| VVT/oil control solenoid | $60 | $303 | Typical listed retail range, source ($454–$595 outliers excluded) |
| Labor 0.5–2 hr | $50 | $320 | $100–$160/hr, shop survey |
⚠️ This is an editorial placeholder range for this type of repair. It is not based on real invoices or licensed pricing data yet. Real ranges will appear here once enough reader invoices for P0021 are verified.
Verified reader invoices for P0021: 0. Share your repair bill to help build real costs.
Tools that can read P0021
- ScanFixAI: Pro $29.99/mo or $249.99/yr
- OBDAI: Annual PRO bundle $299
- BlueDriver Pro Next-Gen: $119.95 list ($99.95 sale seen)
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