VVT System Malfunction (Bank 1)

What it means

This is a code specific to Lexus (and the Toyota group); other makes may use the same number differently. It means the VVT-i system did not move the camshaft to the angle the engine computer requested, or it stayed stuck. On Lexus models of that era the code is closely tied to engine oil condition and the oil control valve (OCV).

Models covered: Lexus models with VVT-i, mainly around 1998–2005 (e.g. ES300, RX300, GS300, IS300).

Related codes: P0011P0012P0010P0016

Symptoms4

• Check engine light on.
• Uneven idle that takes away the usual smoothness at traffic lights.
• Delayed response when pressing the accelerator from low speed.
• Stalling when coming to a stop in some cases.

Possible causes6

• Overdue, low or wrong-viscosity engine oil.
• Oil control valve (OCV) sticking from deposits.
• Clogged oil screen feeding the valve on engines that have one.
• Oil sludge build-up inside the engine.
• Faulty VVT-i controller on the camshaft.
• Timing belt or chain out of position.

How to diagnose5

1. Review the service history and last oil change date, and check oil level and color.
2. Use a scan tool that shows target and actual timing, and command the OCV to see whether idle changes.
3. Remove the OCV and check its movement and cleanliness per the factory procedure.
4. Inspect the VVT oil screen if fitted.
5. Verify the timing marks if the fault remains after the oil and valve are addressed.

How to fix5

1. Change oil and filter to the recommended specification; two close-interval changes may help if sludge is heavy.
2. Clean or replace the VVT oil screen.
3. Replace the oil control valve if it sticks.
4. Replace the VVT-i controller or correct belt or chain timing when proven necessary.
5. Clear the codes and confirm a steady idle with actual timing matching the target.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

An oil change and valve cleaning are at the low end; a VVT-i controller or timing work raises the cost, and genuine Lexus parts can cost a little more than the Toyota equivalent.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions