AutoCodes – Toyota – P0012 2001 Toyota Highlander

P0012 2001 Toyota Highlander Code - Camshaft Position 'A' Timing Over-Retarded Bank 1

Quick Answer

The Engine Control Module (ECM) controls the Oil Control Valve (OCV) to regulate the intake camshaft angle. Common causes include Low or Dirty Engine Oil, Faulty variable valve timing (VVT), Faulty oil control valve (OCV). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0012 2001 Toyota Highlander indicates Camshaft Position 'A' Timing Over-Retarded Bank 1.
Common causes: Common causes include Low or Dirty Engine Oil, Faulty variable valve timing (VVT), Faulty oil control valve (OCV).
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 4,724

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 22, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0012 2001 Toyota Highlander 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 Highlander - Camshaft Position 'A' Timing Over-Retarded Bank 1 - AutoCodes.com — P0012 2001 Toyota Highlander Code - Camshaft Position 'A' Timing Over-Retarded Bank 1

What does this mean?

What are the Possible Causes of the DTC P0012 2001 Toyota Highlander?

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 to Fix the DTC P0012 2001 Toyota Highlander?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0012 2001 Toyota Highlander code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0012 2001 Toyota Highlander code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0012 2001 Toyota Highlander Code

1. What are the common symptoms of OBDII code P0012 in a 2001 Toyota Highlander?

- Common symptoms include rough idling, poor acceleration, engine misfires, and decreased fuel efficiency.

2. What does the OBDII code P0012 indicate in a 2001 Toyota Highlander?

- The code P0012 indicates that the camshaft position 'A' timing is over-retarded on Bank 1.

3. What are the possible causes of OBDII code P0012 in a 2001 Toyota Highlander?

- Potential causes include a faulty camshaft position sensor, issues with the timing chain or belt, engine oil problems, or a malfunctioning variable valve timing (VVT) system.

4. How can I diagnose the cause of OBDII code P0012 in my 2001 Toyota Highlander?

- Diagnosis typically involves checking the camshaft position sensor, inspecting the timing components, verifying proper engine oil levels and quality, and testing the VVT system.

5. Can I continue driving my 2001 Toyota Highlander with OBDII code P0012 present?

- It is not recommended to continue driving with code P0012 present, as it can lead to further engine damage if left unresolved.

6. How can I repair OBDII code P0012 in a 2001 Toyota Highlander?

- Repair may involve replacing the camshaft position sensor, addressing timing chain or belt issues, resolving engine oil-related problems, or repairing the VVT system.

7. Is it possible to reset OBDII code P0012 in a 2001 Toyota Highlander without fixing the underlying issue?

- While clearing the code may temporarily eliminate the warning light, the issue causing code P0012 will likely reoccur if not addressed properly.

8. How much does it typically cost to repair OBDII code P0012 in a 2001 Toyota Highlander?

- The cost of repairs for code P0012 can vary depending on the specific cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P0012 in a 2001 Toyota Highlander?

- Depending on the cause of the code, some DIY enthusiasts with knowledge of automotive repair may be able to address the issue themselves. However, complex repairs may require professional assistance.

10. How often does OBDII code P0012 occur in a 2001 Toyota Highlander?

- The occurrence of code P0012 can vary, but it is relatively common in vehicles with camshaft timing issues, especially as they age and components wear out.