P0011 — "A" Camshaft Position – Timing Over-Advanced or System Performance (Bank 1)
Category: Powertrain Severity: Medium
Updated:
DTC code P0011 means: "A" Camshaft Position – Timing Over-Advanced or System Performance (Bank 1). It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include low, dirty or wrong-viscosity oil, sticking VVT solenoid or clogged solenoid screen and faulty camshaft phaser; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Low, dirty or wrong-viscosity oil
- Sticking VVT solenoid or clogged solenoid screen
- Faulty camshaft phaser
- Stretched timing chain
Symptoms
- Unstable idle
- Hesitation or lack of power
- Engine may stall
- Check engine light
How to diagnose it step by step
- Check oil level and condition.
- Change oil and filter to the correct specification.
- Remove the VVT solenoid and inspect its mesh screen.
- Command the solenoid with a scan tool and watch cam position respond.
- If it doesn't respond, replace the solenoid or phaser.
How to fix it
The cheap first step is an oil and filter change with the exact oil the manufacturer specifies. If the code returns, clean or replace the VVT solenoid; if it persists, inspect the phaser and timing chain.
Estimated repair cost
Oil change: $60–120. VVT solenoid: $120–300. Camshaft phaser: $500–1,300.
Frequently asked questions
What does DTC code P0011 mean?
"A" Camshaft Position – Timing Over-Advanced or System Performance (Bank 1).
Is code P0011 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P0011?
You can drive carefully, but don't ignore it: a bad phaser or chain gets worse quickly.
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