P0391 2009 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 2009 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 2009 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 2009 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 2009 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 2009 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.
Need more information about the P0391 2009 Ford Fusion code?
Need more information on how to fix the P0391 2009 Ford Fusion code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0391 2009 Ford Fusion code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0391 2009 Ford Fusion Code
1. What does the OBDII code P0391 mean on a 2009 Ford Fusion?
P0391 indicates an issue with the Camshaft Position Sensor 'B' Circuit Range/Performance on Bank 2, meaning the sensor is not providing a signal within the expected range.
2. What are the symptoms of code P0391 in a 2009 Ford Fusion?
Common symptoms include difficulty starting the engine, rough idling, poor acceleration, reduced fuel efficiency, and the Check Engine Light being illuminated.
3. What causes the P0391 code in a 2009 Ford Fusion?
Possible causes include a faulty camshaft position sensor, damaged wiring or connectors, a malfunctioning timing chain or belt, and issues with the powertrain control module (PCM).
4. How do I diagnose the P0391 code on my 2009 Ford Fusion?
Start by checking the wiring and connectors for damage, inspect the camshaft position sensor for proper function, and verify the timing components are correctly aligned and in good condition.
5. Can a faulty camshaft position sensor cause the P0391 code?
Yes, a defective camshaft position sensor is a common cause of the P0391 code, as it may fail to send accurate signals to the PCM.
6. What bank is affected by the P0391 code on a 2009 Ford Fusion?
Bank 2 is affected, which refers to the side of the engine opposite the #1 cylinder.
7. Is it safe to drive with the P0391 code on a 2009 Ford Fusion?
Driving with the P0391 code is not recommended, as it can lead to poor engine performance and potential damage to the engine if left unresolved.
8. How do I fix the P0391 code on my 2009 Ford Fusion?
Repairs may include replacing the camshaft position sensor, repairing or replacing damaged wiring or connectors, aligning or replacing timing components, or reprogramming/updating the PCM.
9. Can a timing issue trigger the P0391 code in my 2009 Ford Fusion?
Yes, a misaligned or stretched timing chain/belt can cause incorrect camshaft positioning, leading to the P0391 code.
10. Will clearing the P0391 code fix the problem on my 2009 Ford Fusion?
Clearing the code may temporarily turn off the Check Engine Light, but the underlying issue must be resolved to prevent the code from returning.
Discuss the causes and fixes for P0391 2009 Ford Fusion OBDII Code
Code P0391 2009 Ford Fusion comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
