P0011: Camshaft Position Error (Timing Over-Advanced or System Performance)

Error P0011 indicates a disruption in the camshaft position, essentially camshaft desynchronisation. The code P0011 (Camshaft Position — Timing Over-Advanced or System Performance (Bank 1)), detected during scanner diagnostics, points to a problem with the CVVT (Continuous Variable Valve Timing) system. In this case, it means the camshaft is operating with excessive advance, often linked to the VVT-i valve.

Vehicle behaviour

Typically, the vehicle's behaviour does not change drastically with this error code, as the problem relates to the VVT system—which ensures optimal engine performance—rather than the direct mechanical operation of the camshafts. However, engine operation may become unstable under load at high RPM. Using the CVVT system allows for increased engine power, improved fuel economy, and reduced exhaust emissions.

Registration conditions

Error code P0011 is set and recorded in the ECU memory if delays occur between the calculated and actual angle more than 10 times in a row. When the diagnostic code is registered, the Check Engine light on the dashboard illuminates.

Causes of error P0011

If computer diagnostics or self-diagnostics determine the value P0011, there are several possible causes, which are similar to those triggering error P0016:

1. Damaged wiring or contact issues in the timing system valve connector;
2. Disrupted oil flow to the VCT piston chamber (contaminated oil/clogged oil channel);
3. Failure of the phase regulator (VVT-i valve) due to contamination or following a timing chain replacement (a fairly common occurrence). If the hydraulic valve filter is installed separately and not built into the sensor, ensure it is not clogged;
4. A problem with the camshaft sprocket (gear);
5. A fault in the CVVT system itself (very rare).

Faults and defects of the VVT-i valve

How to fix the error

Having listed the most frequent and primary causes of error P0011, let's look at possible solutions.

First of all, check the integrity of the sensor, its wiring, and ensure there is no oxidation on the connector contacts.

The second step is a visual inspection of the removed phase sensor. It is possible that due to the use of low-quality oil or infrequent oil changes, the valve piston is heavily fouled with carbon deposits (you can try cleaning it with a carb cleaner).

Thirdly, check the VVT valve for functionality. There are several ways to test it; check the relevant guides. If it is faulty, replace it with a new one.

If checks on the variable valve timing solenoid indicate it is working properly (or after replacement), inspect the camshaft teeth for defects.

By following these inspection steps, you should be able to identify the true cause of the P0011 code, regardless of whether the car is a Peugeot, Opel, Nissan, or any other make.

You can perform a primary check before dismantling and inspecting the timing valve by using a diagnostic scanner that tracks various sensor operations in real-time. This allows you to immediately determine if power is reaching the component (electrical continuity) and the state of engine parameters at the moment the error is registered. One accessible option with such capabilities is the Scan Tool Pro Black Edition.

Automotive scanner Scan Tool Pro

Once the cause of the error has been eliminated, the error log must be reset and cleared using software or technical means.