OBDII Code List

P0011 2003 TOYOTA COROLLA - Camshaft Position 'A' Timing Over-Advanced or System Performance Bank 1 3ZZ-FE Engine

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Low or Dirty Engine Oil
  • Variable Valve Timing (VVT) circuit is open or shorted
  • Oil Control Valve (OCV) circuit is open or shorted
  • Faulty variable valve timing (VVT)
  • Faulty oil control valve (OCV)
  • Damaged ECM
  • Tech notes

    Valve timing may have to be adjusted.

    When is the code detected?

    After the ECM sends the target duty and cycle signal to the OCV, the ECM monitors the OCV current to establish an actual dutyandcycle. The ECM determines the existence of a malfunction and sets the DTC when the actual dutyandcycle ratio varies from the target dutyandcycle ratio.

    Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Lack/Loss of power
  • Engine rough idle
  • P0011 2003 Toyota Corolla Description

    The Engine Control Module (ECM) controls the Oil Control Valve (OCV) to regulate the intake camshaft angle. As a result of the angle change, the engine timing is advance or retard. Optimizing engine timing will help the engine improve torque and fuel economy, and the exhaust emissions decrease under overall driving conditions. The Variable Valve Timing (VVT) system includes the Oil Control Valve (OCV) and VVT controller. The ECM detects the actual intake valve timing using signals from the camshaft and crankshaft position sensors, and performs feedback control.
    OBDII Code P0011 2003 Toyota Corolla - Camshaft Position 'A' Timing Over-Advanced or System Performance Bank 1 3ZZ-FE Engine -

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