P0191 2007 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 2007 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 2007 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 2007 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 2007 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 2007 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 2007 Ford Fusion Code
1. What does the OBDII code P0191 mean for a 2007 Ford Fusion?
P0191 indicates a problem with the fuel rail pressure sensor circuit, specifically that the sensor's performance is out of the expected range.
2. What are the symptoms of code P0191 in a 2007 Ford Fusion?
Common symptoms include engine misfires, difficulty starting, poor acceleration, stalling, rough idling, and the check engine light turning on.
3. What causes the P0191 code to appear in a 2007 Ford Fusion?
Potential causes include a faulty fuel rail pressure sensor, a clogged fuel filter, a failing fuel pump, wiring or connector issues, or a malfunctioning fuel pressure regulator.
4. How can I diagnose the P0191 code on my 2007 Ford Fusion?
Use an OBDII scanner to confirm the code, then inspect the fuel rail pressure sensor, wiring, and connectors. Check the fuel pressure with a gauge to determine if it's within the manufacturer’s specifications.
5. Can a dirty fuel filter trigger the P0191 code?
Yes, a clogged or dirty fuel filter can restrict fuel flow and cause inconsistent pressure readings, potentially triggering the P0191 code.
6. Is it safe to drive with the P0191 code on a 2007 Ford Fusion?
Driving with this code isn't recommended, as it can lead to engine stalling or poor performance, which may result in unsafe driving conditions.
7. How can I fix the P0191 code on my 2007 Ford Fusion?
Start by cleaning or replacing the fuel filter, inspecting and repairing wiring or connectors, replacing the fuel rail pressure sensor if faulty, and testing the fuel pump and regulator.
8. How much does it cost to repair the P0191 code on a 2007 Ford Fusion?
The cost varies depending on the issue. Replacing the fuel rail pressure sensor can cost $100-$300, while a fuel pump replacement may cost $500-$1,000, including labor.
9. Can low fuel levels cause the P0191 code on my 2007 Ford Fusion?
Yes, running the vehicle on very low fuel can cause inconsistent fuel pressure readings, potentially triggering the P0191 code.
10. Will clearing the P0191 code fix the problem on a 2007 Ford Fusion?
Clearing the code may turn off the check engine light temporarily, but unless the underlying issue is resolved, the code is likely to return.
Discuss the causes and fixes for P0191 2007 Ford Fusion OBDII Code
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