What does code P0012 mean?

P0012 — Intake camshaft on Bank 1 is retarded from the commanded angle — VVT can't reach full advance. Symptoms: sluggish throttle response, rough idle, occasional stall on cold start. Belongs to the powertrain.fuel system. Severity: warning.

What are the common causes of P0012?

VVT solenoid stuck partially closed; Sludge blocking oil passages in the phaser after skipped oil changes; Worn helical vanes inside the VVT phaser housing; Stretched timing chain, worn tensioner or guides; Low oil pressure — worn pump, thin oil at operating temperature

Can I drive with code P0012?

Limited: reaching the nearest workshop is fine, but avoid long trips. May progress into a more serious fault.

How do I diagnose P0012?

Read the code and freeze-frame with a scanner, check related-system errors, inspect the components listed (wiring, connectors, sensors). See the "How to diagnose" section above for the full step-by-step.

How do I clear code P0012?

The code can be cleared via an OBD-II scanner (e.g. ELM327 + the Car Diagnostics app): plug the adapter into the OBD port, go to Errors → Clear. If the underlying cause isn't fixed, the code will return within a few drive cycles.

OBD-II Code P0012 — Car Diagnostics Platform

What it means

Common causes

VVT solenoid stuck partially closed
Sludge blocking oil passages in the phaser after skipped oil changes
Worn helical vanes inside the VVT phaser housing
Stretched timing chain, worn tensioner or guides
Low oil pressure — worn pump, thin oil at operating temperature
Broken circuit to the VVT solenoid

How to diagnose

01
Read all stored and pending codes with an OBD-II adapter — get the full picture, not just the one code.
02
Capture freeze-frame data (RPM, coolant temperature, engine load) at the exact moment the code triggered.
03
Inspect the named subsystem with our app's AI explanation — get vehicle-specific causes for your make, model and year.

Decode P0012 on your actual car

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