P0021 — "A" Camshaft Position – Timing Over-Advanced or System Performance (Bank 2)
Category: Powertrain Severity: Medium
Updated:
DTC code P0021 means: "A" Camshaft Position – Timing Over-Advanced or System Performance (Bank 2). It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include low or incorrect oil, sticking bank 2 VVT solenoid and faulty bank 2 phaser; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Low or incorrect oil
- Sticking bank 2 VVT solenoid
- Faulty bank 2 phaser
- Stretched chain
Symptoms
- Unstable idle
- Hesitation
- Check engine light
- Higher fuel consumption
How to diagnose it step by step
- Check the oil.
- Clean or replace the bank 2 VVT solenoid.
- Check response with a scan tool.
- Inspect the phaser and chain if it persists.
How to fix it
Change oil and filter, then check the bank 2 VVT solenoid.
Estimated repair cost
From $60 to $2,000 depending on the cause.
Frequently asked questions
What does DTC code P0021 mean?
"A" Camshaft Position – Timing Over-Advanced or System Performance (Bank 2).
Is code P0021 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P0021?
You can drive carefully in the short term.
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