P0191 2011 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 2011 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 2011 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 2011 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 2011 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 2011 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 2011 Ford Fusion Code
1. What are common symptoms of OBDII code P0191 on a 2011 Ford Fusion?
- Common symptoms include rough idle, engine misfires, loss of power, and possibly stalling.
2. What causes the OBDII code P0191 on a 2011 Ford Fusion?
- The code is typically triggered by issues with the fuel rail pressure sensor, such as a faulty sensor, wiring problems, or a malfunctioning fuel pump.
3. How can I diagnose the cause of OBDII code P0191 on my 2011 Ford Fusion?
- Diagnose the code by checking the fuel pressure with a gauge, inspecting the fuel rail pressure sensor and its wiring for damage, and scanning for any related trouble codes.
4. Can a dirty fuel filter trigger code P0191 on a 2011 Ford Fusion?
- Yes, a clogged or dirty fuel filter can restrict fuel flow and lead to low fuel pressure, potentially triggering the P0191 code.
5. Is it safe to drive my 2011 Ford Fusion with OBDII code P0191?
- It is not recommended to drive your vehicle with the P0191 code as it can lead to poor engine performance and potential stalling, causing safety concerns.
6. How can I repair OBDII code P0191 on my 2011 Ford Fusion?
- Repair options include replacing the fuel rail pressure sensor, repairing or replacing damaged wiring, ensuring proper fuel pressure, and clearing the trouble code.
7. Will resetting the check engine light resolve OBDII code P0191 on a 2011 Ford Fusion?
- Resetting the check engine light may temporarily clear the code, but if the underlying issue causing P0191 is not addressed, the code is likely to return.
8. Can extreme weather conditions trigger OBDII code P0191 on a 2011 Ford Fusion?
- Extreme heat or cold can affect fuel pressure readings, potentially leading to the triggering of code P0191 in a 2011 Ford Fusion.
9. How much does it cost to fix OBDII code P0191 on a 2011 Ford Fusion?
- The cost of fixing P0191 can vary depending on the cause, but it may range from $100 to $300 for parts and labor, excluding diagnostic fees.
10. Are there any recalls related to OBDII code P0191 on a 2011 Ford Fusion?
- It's advisable to check with Ford or the National Highway Traffic Safety Administration (NHTSA) for any recalls related to the P0191 code on a 2011 Ford Fusion.
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