Camshaft Position ‘A’ Timing Over-Retarded Bank 1
Table of contents
- Possible Causes
- How To Fix
- Tech Notes
- Cost To Diagnose
- When is the code detected
- Possible Symptoms
- Description
P0012 TOYOTA 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
- Faulty Engine Control Module (ECM)
How do I fix code P0012 TOYOTA?
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.
Tech Notes
- There are factory service bulletins for the following Toyota models:
- 2005 Toyota Corolla
- 2006 Toyota Corolla
- 2007 Toyota Corolla
- 2005 Toyota Matrix
- 2006 Toyota Matrix
- 2007 Toyota Matrix
- 2005-2007 Toyota Corolla, Matrix Factory Service Bulletin OBDII Code P0012
- 2005 Toyota Camry
- 2006 Toyota Camry
- 2007 Toyota Camry
- 2005-2007 Toyota Camry Service Bulletin OBDII Code P0012
Cost of diagnosing the P0012 TOYOTA code
The cost of diagnosing the P0012 TOYOTA 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 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.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible Lack/Loss of power
- Possible Engine rough idle
P0012 TOYOTA 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.