This engine uses variable valve timing to adjust when the intake camshaft opens the valves. The computer has detected that the camshaft is positioned further "advanced" than commanded — the variable timing system isn't tracking its target position accurately.
Symptoms
- Rough idle and reduced low-end power
- A rattling or ticking noise from the timing chain area, especially on startup
- Reduced fuel economy
- Possible slight hesitation during acceleration
Likely causes
- Low engine oil level or badly degraded oil — the variable timing solenoid relies on oil pressure to actually move the camshaft, and dirty/low oil is the single biggest cause
- A clogged variable timing (VVT) oil control solenoid, often from sludge buildup
- Timing chain stretch/wear letting the camshaft drift out of its intended position
- A failed VVT solenoid itself
How to diagnose it
- Check oil level and condition first — this resolves a large share of VVT-related codes on its own
- Inspect and, if needed, clean the VVT oil control solenoid (often accessible without major disassembly)
- If oil and solenoid are fine, check for timing chain stretch using the manufacturer's specified procedure
Typical fixes & cost
- Oil and filter change with the correct viscosity oil60–150 EUR
- Clean or replace the VVT oil control solenoid100–350 EUR
- Timing chain replacement, if worn (labor-intensive on most engines)500–1500 EUR
Code names are compiled from open/standardized SAE and ISO references. Explanations, symptoms, causes and fixes are original. Covers generic (P0/C0/B0/U0) codes only — manufacturer-specific codes are planned for a future update.
AS
Reviewed by Artyom SemenovAutomotive Editor · Fact-checked by Yauheni Kapliarchuk, Editor-in-Chief