AutoCodes - Toyota - P0012 2001 TOYOTA COROLLA

P0012 2001 TOYOTA COROLLA Code - Camshaft Position 'A' Timing Over-Retarded Bank 1 3ZZ-FE Engine

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|P0012 2001 TOYOTA COROLLA code 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

|How do I fix the P0012 2001 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 2001 TOYOTA COROLLA code tech notes

Valve timing may have to be adjusted.

|Cost of diagnosing the P0012 2001 TOYOTA COROLLA code

Labor: 1.0

The cost of diagnosing the P0012 2001 TOYOTA COROLLA code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0012 2001 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.

|What are P0012 2001 TOYOTA COROLLA code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible Lack/Loss of power
  • Possible Engine rough idle

|P0012 2001 TOYOTA COROLLA code 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 P0012 2001 Toyota Corolla - Camshaft Position 'A' Timing Over-Retarded Bank 1 3ZZ-FE Engine - AutoCodes.com

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|P0012 2001 TOYOTA COROLLA code comments

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