P0012 Code — Intake Camshaft Position Timing Over-Retarded (Bank 1) (Causes, Cost & How to Fix)

Quick Diagnosis: P0012 Intake Camshaft Position Timing Over-Retarded

The P0012 code is triggered when the engine control module (ECM) detects that the intake camshaft position timing is over-retarded on Bank 1. This can be caused by a variety of factors, including faulty camshaft position sensors, crankshaft position sensors, or oil control valves.

Safety Precautions

Before starting the diagnosis and repair process, make sure to follow proper safety precautions:

• Always disconnect the battery before working on the engine to avoid any accidental starts or electrical shocks.
• Wear protective gear, such as gloves and safety glasses, when working with tools and electrical components.
• Make sure the vehicle is on a level surface and apply the parking brake before starting the engine.

Symptoms of a P0012 Code

If your vehicle is experiencing a P0012 code, you may notice a variety of symptoms, including:

• Reduced engine performance
• Decreased fuel efficiency
• Rough engine idle
• Engine stalling or hesitation

Diagnostic Steps

To diagnose and repair a P0012 code, follow these steps:

Step 1: Initial Checks

Begin by checking the basics:

• Ensure the engine oil level is at the recommended level.
• Check the engine oil for any signs of contamination or degradation.

Step 2: Scan for Additional Codes

Use an OBD-II scanner to scan for any additional codes that may be related to the P0012 code. This can help you identify any other issues that may be contributing to the problem.

Step 3: Camshaft Position Sensor Check

Inspect the camshaft position sensor for any signs of damage or wear. Make sure it is clean and free of debris. Use a multimeter to check the voltage signal from the sensor. The voltage signal should be between 0.5 and 1.5 volts.

Step 4: Crankshaft Position Sensor Check

Inspect the crankshaft position sensor for any signs of damage or wear. Make sure it is clean and free of debris. Use a multimeter to check the voltage signal from the sensor. The voltage signal should be between 0.5 and 1.5 volts.

Step 5: Oil Control Valve Check

Inspect the oil control valve for any signs of damage or wear. Make sure it is clean and free of debris. Use a multimeter to check the voltage signal from the valve. The voltage signal should be between 0.5 and 1.5 volts.

Cost Estimates

The cost to repair a P0012 code can vary depending on the cause of the issue and the labor rates in your area. Here are some estimated costs:

• DIY repair:
  • Camshaft position sensor: $50-$200
  • Crankshaft position sensor: $50-$200
  • Oil control valve: $100-$500
  • Labor: $0 (if you’re doing the repair yourself)
• Shop repair:
  • Labor: $100-$500
  • Parts: $200-$1,000

Affected Vehicles

The P0012 code can affect a variety of vehicles, including:

• Toyota: 4Runner, Camry, Corolla, RAV4
• Honda: Civic, Accord, CR-V
• Ford: F-150, Mustang, Focus
• Chevy: Silverado, Cruze, Malibu

Preventive Maintenance

To prevent a P0012 code from occurring in the future, make sure to:

• Regularly check the engine oil level and top it off as needed
• Use the recommended type of engine oil
• Avoid extreme temperatures and driving conditions
• Keep the engine clean and free of debris

Driving Safety

While you can still drive with a P0012 code, it’s not recommended as it may cause reduced engine performance and potentially lead to engine damage over time. It’s best to diagnose and repair the issue as soon as possible to prevent any further damage.

Emissions Impact

A P0012 code can cause your vehicle to fail an emissions test, as it indicates a problem with the engine’s emissions control system. If you’re due for an emissions test, it’s best to diagnose and repair the issue before taking your vehicle in for testing.

Related DTC Pages

For more information on related DTCs, check out:

• P0010: Intake Camshaft Position Actuator Circuit (Bank 1)
• P0020: Intake Camshaft Position Actuator Circuit (Bank 2)
• P0335: Crankshaft Position Sensor A Circuit (
• P0400: Exhaust Gas Recirculation (EGR) System Flow Insufficient Detected

with these steps and taking the necessary precautions, you can diagnose and repair a P0012 code and get your vehicle running smoothly again.

Real-World Diagnostic Scenario: P0012

When a technician encounters P0012 in the shop, the diagnostic approach differs significantly from other codes. Unlike generic fuel system codes, P0012 requires checking specific subsystems in a particular order to avoid misdiagnosis. Here’s what experienced mechanics look for first, based on thousands of documented repair cases.

Known Technical Service Bulletins (TSBs) Related to P0012

Several manufacturers have issued TSBs specifically addressing the root causes of P0012. Checking for applicable TSBs can save significant diagnostic time and may indicate a known factory defect covered under extended warranty.

Note: TSB availability varies by manufacturer and model year. Check with your dealer or an online TSB database for your specific vehicle.

Frequently Asked Questions

Q: What is the typical repair cost for code P0012, and does it vary by vehicle make?

The typical repair cost for code P0012 can range from $200 to $1,500, depending on the vehicle make and model. For example, on a Chevrolet Equinox, the repair cost may be around $300-$500, while on a Ford F-150, it may be closer to $500-$700. The cost of replacing the intake camshaft position actuator solenoid or the camshaft position sensor is usually the main factor in determining the overall repair cost.

Q: Is it safe to drive with code P0012, or can it cause further damage to my engine?

Driving with code P0012 can lead to decreased engine performance, reduced fuel efficiency, and potentially cause further damage to the engine over time. However, it is not typically considered an emergency situation, and driving for a short period will not cause catastrophic damage. Nevertheless, it is recommended to address the issue as soon as possible to prevent any potential long-term damage.

Q: What is the most common cause of code P0012 on Toyota Camry and Honda Civic models?

On Toyota Camry and Honda Civic models, the most common cause of code P0012 is a faulty intake camshaft position actuator solenoid. This solenoid is responsible for controlling the camshaft position, and when it fails, it can cause the engine computer to set code P0012. In some cases, a dirty or clogged oil control valve can also contribute to this issue.

Q: Will code P0012 cause my vehicle to fail an emissions test?

Code P0012 can potentially cause a vehicle to fail an emissions test, as it can lead to increased emissions due to the engine running rich or unevenly. However, the likelihood of failing an emissions test depends on the severity of the issue and the specific emissions standards in your area. It is recommended to address the issue before taking your vehicle in for an emissions test to ensure you pass.

Q: How long does it typically take to repair code P0012, and can I do it myself?

The repair time for code P0012 can vary depending on the complexity of the issue and the technician’s level of experience. On average, a professional mechanic can complete the repair in about 1-3 hours, depending on the vehicle make and model. While it is possible to attempt the repair yourself, it is not recommended, as it requires specialized tools and knowledge to diagnose and fix the issue correctly.

Q: What is the difference between code P0012 and related codes such as P0011 and P0013?

Code P0012 is specific to the intake camshaft position actuator solenoid, while code P0011 relates to the exhaust camshaft position actuator solenoid. Code P0013, on the other hand, indicates a problem with the exhaust camshaft position actuator solenoid circuit. Understanding the specific code and its corresponding cause is crucial in diagnosing and repairing the issue correctly.

Q: Can code P0012 be caused by low oil levels or poor oil quality, and how can I prevent it?

Yes, code P0012 can be caused by low oil levels or poor oil quality, as the intake camshaft position actuator solenoid relies on proper oil flow and pressure to function correctly. To prevent code P0012, it is essential to maintain the recommended oil level and use high-quality oil that meets the manufacturer’s specifications. Regular oil changes and monitoring the oil level can also help prevent this issue.

Q: Will clearing code P0012 with a scan tool resolve the issue, or is further repair required?

Clearing code P0012 with a scan tool will only temporarily resolve the issue, as it does not address the underlying cause of the problem. To permanently fix the issue, it is necessary to diagnose and repair the faulty component, such as the intake camshaft position actuator solenoid or the camshaft position sensor. Simply clearing the code may lead to the issue reoccurring, and further repair will be required to resolve it permanently.

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