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P0391 2011 Ford Fusion Code - Camshaft Position Sensor 'B' Circuit Range/Performance Bank 2

Quick Answer

The P0391 diagnostic trouble code (DTC) for a 2011 Ford Fusion indicates a problem with the Camshaft Position Sensor 'B' Circuit Range/Performance Bank 2. Common causes include Faulty camshaft position sensor, Wiring or connector issues related to the camshaft position sensor, ECM software or hardware problems. 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
P0391 2011 Ford Fusion indicates Camshaft Position Sensor 'B' Circuit Range/Performance Bank 2.
Common causes
Common causes include Faulty camshaft position sensor, Wiring or connector issues related to the camshaft position sensor, ECM software or hardware problems.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P0391 2011 Ford Fusion Description

The P0391 diagnostic trouble code (DTC) for a 2011 Ford Fusion indicates a problem with the Camshaft Position Sensor 'B' Circuit Range/Performance Bank 2. This means that the Engine Control Module (ECM) has detected that the camshaft position sensor is sending signals that are outside the expected range or performance level for Bank 2, which typically refers to the side of the engine where cylinder number 2 is located. The camshaft position sensor plays a crucial role in the engine's operation by monitoring the position of the camshaft and sending this information to the ECM to ensure proper fuel injection timing and ignition timing. When this sensor malfunctions or sends incorrect signals, it can lead to a variety of performance issues and potential long-term effects if not addressed promptly.

OBDII Code P0391 2011 Ford Fusion - Camshaft Position Sensor 'B' Circuit Range/Performance Bank 2
P0391 2011 Ford Fusion Code - Camshaft Position Sensor 'B' Circuit Range/Performance Bank 2

Common Causes of P0391 2011 Ford Fusion

  1. Faulty camshaft position sensor
  2. Wiring or connector issues related to the camshaft position sensor
  3. ECM software or hardware problems
  4. Mechanical issues with the camshaft itself
  5. Timing chain or belt problems affecting camshaft position

Symptoms of P0391 2011 Ford Fusion

  1. Rough idling or engine stalling
  2. Poor acceleration or loss of power
  3. Decreased fuel efficiency
  4. Engine misfires
  5. Check Engine Light illuminated on the dashboard

How to Fix P0391 2011 Ford Fusion

  1. Begin by diagnosing the specific cause of the code using a diagnostic scan tool to pinpoint the issue with the camshaft position sensor on Bank 2.
  2. Inspect the wiring and connectors associated with the camshaft position sensor for any damage, corrosion, or loose connections.
  3. Test the camshaft position sensor's functionality using a multimeter to verify if it is sending accurate signals to the ECM.
  4. Replace the camshaft position sensor if it is found to be faulty, ensuring proper installation and calibration according to manufacturer specifications.
  5. Clear the DTC from the ECM's memory and test drive the vehicle to confirm that the issue has been resolved and the code does not reappear.

Cost to Fix P0391 2011 Ford Fusion

The typical repair costs for addressing a P0391 code on a 2011 Ford Fusion can vary depending on the specific cause of the issue and the cost of parts and labor. In general, replacing a camshaft position sensor can range from $50 to $200, while diagnostic testing and labor may add another $100 to $300 to the total cost. Overall, the total repair cost for resolving this code could range from $150 to $500, but it's important to note that prices can vary based on factors such as location, vehicle make and model, and labor rates at auto repair shops. It's recommended to obtain a detailed estimate from a qualified mechanic to determine the exact cost for addressing this issue.

What does this mean?

Tech Notes for P0391 2011 Ford Fusion

Sometimes and in some models, low battery voltage or a weak starter can trigger a Camshaft Position Sensor code.

When is the Code Detected?

The camshaft position sensor signal sent to the Engine Control Module (ECM) during the first few seconds of engine cranking is out of range.

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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 P0391 2011 Ford Fusion Code

1. What are the common symptoms of OBDII code P0391 in a 2011 Ford Fusion?

- Common symptoms include rough idling, engine stalling, decreased fuel efficiency, and difficulty starting the vehicle.

2. What can cause OBDII code P0391 to trigger in a 2011 Ford Fusion?

- The code is typically triggered by issues with the camshaft position sensor 'B', wiring problems, or sensor circuit malfunction in Bank 2.

3. How can I diagnose the Camshaft Position Sensor 'B' Circuit Range/Performance Bank 2 issue in my 2011 Ford Fusion?

- Diagnosis involves checking the camshaft position sensor 'B' for proper connection, inspecting related wiring for damage, and using a diagnostic scanner to read the code.

4. Is it safe to continue driving with OBDII code P0391 in a 2011 Ford Fusion?

- It is not recommended to drive with this code as it can lead to potential engine performance issues and further damage if left unaddressed.

5. Can I repair OBDII code P0391 in a 2011 Ford Fusion myself?

- Depending on your mechanical skills, you may be able to replace the camshaft position sensor 'B' or repair wiring issues yourself. However, professional diagnosis and repair are recommended for accurate resolution.

6. Are there any tips for preventing OBDII code P0391 from recurring in a 2011 Ford Fusion?

- Regular maintenance, such as timely sensor replacements and checking for wiring issues, can help prevent the recurrence of this code.

7. How much does it typically cost to repair OBDII code P0391 in a 2011 Ford Fusion?

- The cost of repairing this code can vary based on the extent of the issue, but it may range from $100 to $300 for parts and labor.

8. Will resetting the OBDII system clear the P0391 code in a 2011 Ford Fusion?

- While resetting the system may temporarily clear the code, it will reappear if the underlying issue causing the code is not addressed.

9. Can a faulty camshaft position sensor cause other OBDII codes to trigger in a 2011 Ford Fusion?

- Yes, a faulty camshaft position sensor can cause a range of related OBDII codes to trigger, impacting the engine's performance and efficiency.

10. How long does it take to repair OBDII code P0391 in a 2011 Ford Fusion at a professional auto repair shop?

- The repair time can vary depending on the shop's workload and the exact cause of the issue, but the repair typically takes around 1-2 hours to complete.

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