P0191 2010 Ford Fusion Code - Fuel Rail Pressure Sensor Circuit Range/Performance
Quick Answer
The Fuel Rail Pressure (FRP) Sensor is a diaphragm strain gauge device. Common causes include Low or no fuel, Faulty Fuel Rail Pressure (FRP) Sensor, FRP harness is open or shorted. 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
- P0191 2010 Ford Fusion indicates Fuel Rail Pressure Sensor Circuit Range/Performance.
- Common causes
- Common causes include Low or no fuel, Faulty Fuel Rail Pressure (FRP) Sensor, FRP harness is open or shorted.
- 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 P0191 2010 Ford Fusion Description
The FRP sensor is located on the fuel rail and provides a feedback signal to indicate the fuel rail pressure to the Powertrain Control Module (PCM). The PCM uses the FRP signal to command the correct injector timing and pulse width for correct fuel delivery at all speed and load conditions. The FRP sensor, along with the fuel volume regulator (part of the fuel injection pump), forms a closed loop fuel pressure control system. An electrically faulted FRP sensor results in the deactivation of the fuel injection pump. Fuel pressure to injectors is then provided only by the FP module. When the fuel injection pump is de-energized and the injectors are active, the fuel rail pressure is approximately 70 kPa (10 psi) lower than FP module pressure due to the pressure drop across the fuel injection pump. Thus, if the FP module pressure is 448 kPa (65 psi), then the fuel rail pressure would be approximately 379 kPa (55 psi) if the injectors are active.
What are the Possible Causes of the DTC P0191 2010 Ford Fusion?
- Low or no fuel
- Faulty Fuel Rail Pressure (FRP) Sensor
- FRP harness is open or shorted
- FRP circuit poor electrical connection
- Faulty Fuel Pump
How to Fix the DTC P0191 2010 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0191 2010 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 P0191 2010 Ford Fusion Code
1. What are the common symptoms of OBDII code P0191 in a 2010 Ford Fusion?
- Common symptoms include rough idling, engine stalling, decreased fuel efficiency, and the illumination of the check engine light.
2. What can cause the OBDII code P0191 to trigger in a 2010 Ford Fusion?
- The code is typically triggered by issues with the fuel rail pressure sensor or its circuit, such as sensor malfunction, wiring problems, or a faulty fuel pressure regulator.
3. How can I diagnose the cause of OBDII code P0191 in my 2010 Ford Fusion?
- Diagnosing the issue involves checking the fuel rail pressure sensor readings, inspecting the wiring for damage, and testing the fuel pressure regulator for proper functioning.
4. Is it safe to continue driving with OBDII code P0191 in a 2010 Ford Fusion?
- It is not recommended to continue driving with this code, as it can lead to poor engine performance, potential stalling, and possible damage to the fuel system components.
5. Can a DIY enthusiast repair OBDII code P0191 in a 2010 Ford Fusion?
- While some basic troubleshooting steps can be performed by DIY enthusiasts, repairing this code may require specialized tools and expertise, especially when dealing with fuel system components.
6. How much does it typically cost to repair OBDII code P0191 in a 2010 Ford Fusion?
- The cost of repairing this code can vary depending on the exact cause of the issue, but it may range from $200 to $500, including parts and labor.
7. Are there any preventive measures to avoid triggering OBDII code P0191 in a 2010 Ford Fusion?
- Regular maintenance, such as fuel system inspections and timely replacement of the fuel filter, can help prevent issues that may trigger the P0191 trouble code.
8. Can a faulty fuel pressure sensor cause other codes to appear in a 2010 Ford Fusion?
- Yes, a faulty fuel pressure sensor can sometimes trigger related trouble codes, such as P0190 (Fuel Rail Pressure Sensor Circuit Malfunction) or P0192 (Fuel Rail Pressure Sensor Circuit Low Input).
9. How long does it take to repair OBDII code P0191 in a 2010 Ford Fusion?
- The repair time can vary depending on the exact cause of the issue and the availability of parts, but it typically takes around 1-2 hours for a skilled mechanic to diagnose and fix the problem.
10. Can resetting the check engine light resolve OBDII code P0191 in a 2010 Ford Fusion?
- Simply resetting the check engine light will not fix the underlying issue causing the code. It is important to diagnose and address the root cause of the problem to prevent the code from reappearing.
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