AutoCodes – Ford – P0190 2012 Ford Fusion

P0190 2012 Ford Fusion Code - Fuel Rail Pressure Sensor Circuit Malfunction

Quick Answer

The FRP sensor is a diaphragm strain gauge device. Common causes include Low or no fuel, Faulty 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: P0190 2012 Ford Fusion indicates Fuel Rail Pressure Sensor Circuit Malfunction.
Common causes: Common causes include Low or no fuel, Faulty 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.

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Code Popularity 8,181

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0190 2012 Ford Fusion Description

The FRP sensor is a diaphragm strain gauge device. The FRP sensor measures the pressure difference between the fuel rail and atmospheric pressure. The FRP sensor nominal output varies between 0.5 and 4.5 volts, with 0.5 volts corresponding to 0 MPa (0 psi) gauge and 4.5 volts corresponding to 26 MPa (3771 psi) gauge. The sensor can read vacuums and may lower the output voltage to slightly below 0.5 volts. This condition is normal and is usually the case after several hours of cold soak before the vehicle dome light is turned on. The FP module is energized at the same time the dome light is commanded on. A disabled or malfunctioning dome light does not affect the FP module control.
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), form 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.

OBDII Code P0190 2012 Ford Fusion - Fuel Rail Pressure Sensor Circuit Malfunction - AutoCodes.com — P0190 2012 Ford Fusion Code - Fuel Rail Pressure Sensor Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0190 2012 Ford Fusion?

Low or no fuel
Faulty Rail Pressure (FRP) Sensor
FRP harness is open or shorted
FRP circuit poor electrical connection
Faulty Fuel Pump

How to Fix the DTC P0190 2012 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 P0190 2012 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0190 2012 Ford Fusion Code

1. What does the OBDII code P0190 mean for a 2012 Ford Fusion?

P0190 indicates a malfunction in the Fuel Rail Pressure Sensor Circuit, which monitors fuel pressure in the rail to ensure proper fuel delivery to the engine.

2. What are the symptoms of code P0190 in a 2012 Ford Fusion?

Common symptoms include poor engine performance, rough idling, stalling, hard starting, reduced fuel efficiency, and the Check Engine Light turning on.

3. What causes the P0190 code to appear on a 2012 Ford Fusion?

Potential causes include a faulty fuel rail pressure sensor, damaged wiring or connectors, fuel pump issues, or a malfunctioning powertrain control module (PCM).

4. Can I drive my 2012 Ford Fusion with a P0190 code?

Driving with a P0190 code is not recommended as it may result in poor performance, increased fuel consumption, or further damage to the engine and fuel system.

5. How do I diagnose the P0190 code on a 2012 Ford Fusion?

Inspect the fuel rail pressure sensor, wiring, and connectors for damage. Use a multimeter to check sensor voltage and continuity. A scan tool can also monitor real-time fuel pressure readings.

6. How much does it cost to fix the P0190 code on a 2012 Ford Fusion?

Repair costs vary but typically range from $150 to $400, depending on whether the fuel rail pressure sensor, wiring, or other components need replacement.

7. Can a clogged fuel filter cause the P0190 code on a 2012 Ford Fusion?

While rare, a clogged fuel filter can indirectly trigger the code by causing inconsistent fuel pressure, which the sensor may interpret as a fault.

8. How do I reset the P0190 code on my 2012 Ford Fusion?

After repairs, use an OBDII scanner to clear the code. However, ensure the issue is resolved to prevent the code from returning.

9. What tools do I need to fix the P0190 code on a 2012 Ford Fusion?

Basic tools include an OBDII scanner, a multimeter, and potentially new parts like a fuel rail pressure sensor or replacement wiring.

10. Can a bad PCM cause the P0190 code on a 2012 Ford Fusion?

Yes, though it's less common. A malfunctioning PCM can misinterpret or fail to process signals from the fuel rail pressure sensor, triggering the code.