What is the P0012 fault code?

[VonNora]

P0012 is the fault code for Camshaft Position Actuator - Timing Over-Retarded (Bank 1), which means the vehicle's ignition timing is too late. The following are the reasons that may cause the P0012 fault code to appear: 1. Engine: Fuel control, variable valve timing control, ESA control, electronic ignition advance, controlling the ignition timing optimally based on the engine's operating condition. Degradation caused by mechanical variations between engines and aging of internal OCV components can lead to changes in holding current. Therefore, the PCM continuously learns the changing current (holding current learning value) to keep the spool valve in the neutral position. 2. Valve timing: Target valve timing, determined by engine speed and volumetric efficiency, represents the actual valve timing. This indicates the current valve timing. The actual valve timing is calculated by adding the maximum camshaft delay learning value during power-on to the values measured by the CMP and CKP sensors.