P0391 2008 Ford Fusion Code - Camshaft Position Sensor 'B' Circuit Range/Performance Bank 2
Quick Answer
The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. Common causes include Faulty Camshaft Position Sensor, Camshaft Position Sensor harness is open or shorted, Camshaft Position Sensor circuit poor electrical connection. 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 2008 Ford Fusion indicates Camshaft Position Sensor 'B' Circuit Range/Performance Bank 2.
- Common causes
- Common causes include Faulty Camshaft Position Sensor, Camshaft Position Sensor harness is open or shorted, Camshaft Position Sensor circuit poor electrical connection.
- 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.
Code P0391 2008 Ford Fusion Description
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.
What are the Possible Causes of the DTC P0391 2008 Ford Fusion?
- Faulty Camshaft Position Sensor
- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Faulty starter motor
- Starting system circuit
- Dead (Weak) battery
How to Fix the DTC P0391 2008 Ford Fusion?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0391 2008 Ford Fusion 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.
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Frequently Asked Questions about P0391 2008 Ford Fusion Code
1. What are the common symptoms of OBDII code P0391 in a 2008 Ford Fusion?
- Common symptoms include engine misfires, rough idling, poor acceleration, and difficulty starting the vehicle.
2. What does the OBDII code P0391 indicate in a 2008 Ford Fusion?
- The code P0391 indicates an issue with the Camshaft Position Sensor 'B' Circuit Range/Performance in Bank 2 of the engine.
3. What are some possible causes of OBDII code P0391 in a 2008 Ford Fusion?
- Possible causes include a faulty camshaft position sensor, wiring issues, a damaged camshaft, timing belt problems, or issues with the engine control module.
4. How can I diagnose the cause of OBDII code P0391 in my 2008 Ford Fusion?
- Diagnosing the issue involves using a scan tool to check for the specific code, inspecting the camshaft position sensor and its wiring, and testing the sensor's functionality.
5. Can I still drive my 2008 Ford Fusion with the OBDII code P0391 present?
- It is not recommended to drive the vehicle with this code present, as it can lead to further engine damage and potentially unsafe driving conditions.
6. How can I repair OBDII code P0391 in my 2008 Ford Fusion?
- Repairing the issue may involve replacing the camshaft position sensor, repairing any damaged wiring, addressing timing belt problems, or resetting the engine control module.
7. Is it possible to reset the OBDII code P0391 in a 2008 Ford Fusion without making repairs?
- While clearing the code may temporarily turn off the check engine light, the underlying issue causing the code will still persist and may lead to further problems if not addressed.
8. How much does it typically cost to repair OBDII code P0391 in a 2008 Ford Fusion?
- The cost of repairs can vary depending on the specific cause of the code, but it may range from $100 to $300 for parts and labor.
9. Can a DIY enthusiast fix OBDII code P0391 in a 2008 Ford Fusion?
- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to replace the camshaft position sensor or address wiring issues associated with this code.
10. How can I prevent OBDII code P0391 from occurring in my 2008 Ford Fusion in the future?
- Regular maintenance, such as checking and replacing the camshaft position sensor at recommended intervals, can help prevent the recurrence of this code.
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