P0012 2003 TOYOTA COROLLA - Camshaft Position 'A' Timing Over-Retarded Bank 1 3ZZ-FE Engine
P0012 2003 TOYOTA COROLLA Possible Causes
- Low or Dirty Engine Oil
- Faulty variable valve timing (VVT)
- Faulty oil control valve (OCV)
- Variable Valve Timing (VVT) harness is open or shorted
- Oil Control Valve (OCV) harness circuit is open or shorted
- Damaged ECM
First diagnose P0012 2003 TOYOTA COROLLA code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
P0012 2003 TOYOTA COROLLA Tech NotesValve timing may have to be adjusted.
Cost of diagnosing the P0012 2003 TOYOTA COROLLA code
Labor: 1.0The cost of diagnosing the P0012 2003 TOYOTA COROLLA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the P0012 2003 TOYOTA COROLLA code detected?After the ECM sends the target duty cycle signal to the OCV, the ECM monitors the OCV current to establish an actual duty cycle. The ECM determines the existence of a malfunction and sets the DTC when the actual duty cycle ratio varies from the target duty cycle ratio.
P0012 2003 TOYOTA COROLLA Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible Lack/Loss of power
- Possible Engine rough idle
P0012 2003 Toyota Corolla DescriptionThe 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.
P0012 2003 TOYOTA COROLLA More InformationNeed more information on how to fix the P0012 2003 TOYOTA COROLLA code?
Get Access to Factory Service Manuals
Need more help?Get the P0012 2003 Toyota Corolla code diagnosed by a professional: Find a repair shop in your area
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