AutoCodes – Ford – P0231 2008 Ford Fusion

P0231 2008 Ford Fusion Code - Fuel Pump Secondary Circuit Low

Quick Answer

The Powertrain Control Module (PCM) monitors the Fuel Pump Monitor (FPM) circuit. Common causes include Blown Fuel Pump fuse, Open Fuel Pump Monitor Circuit, Faulty Fuel Pump Relay. 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: P0231 2008 Ford Fusion indicates Fuel Pump Secondary Circuit Low.
Common causes: Common causes include Blown Fuel Pump fuse, Open Fuel Pump Monitor Circuit, Faulty Fuel Pump Relay.
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 4,163

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 13, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0231 2008 Ford Fusion Description

The Powertrain Control Module (PCM) monitors the Fuel Pump Monitor (FPM) circuit. The test fails if the PCM commands the fuel pump ON and B+ voltage is not detected on the FPM circuit.

OBDII Code P0231 2008 Ford Fusion - Fuel Pump Secondary Circuit Low - AutoCodes.com — P0231 2008 Ford Fusion Code - Fuel Pump Secondary Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0231 2008 Ford Fusion?

Blown Fuel Pump fuse
Open Fuel Pump Monitor Circuit
Faulty Fuel Pump Relay
Damaged Engine Control Module (ECM)

How to Fix the DTC P0231 2008 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 does this mean?

Code Tech Notes

For some FORD models:
1. Disconnect the inertia switch harness connector
2. Turn key to ON position (Engine OFF)
3. Measure voltage of circuit between inertia switch harness connector and ground
4. If battery voltage is found, replaced Inertia Switch
5. Clear codes.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0231 2008 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 P0231 2008 Ford Fusion code?

Need more information on how to fix the P0231 2008 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0231 2008 Ford Fusion code diagnosed by a professional: Find a repair shop in your area

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 P0231 2008 Ford Fusion Code

1. What are the common symptoms of OBDII code P0231 on a 2008 Ford Fusion?

- Common symptoms include stalling, rough idling, loss of power, and difficulty starting the vehicle.

2. What does the OBDII code P0231 "Fuel Pump Secondary Circuit Low" mean on a 2008 Ford Fusion?

- This code indicates that the fuel pump secondary circuit is experiencing low voltage, which can lead to fuel delivery issues.

3. What are the possible causes of OBDII code P0231 on a 2008 Ford Fusion?

- Possible causes include a faulty fuel pump, damaged wiring or connectors, a blown fuse, or a malfunctioning fuel pump relay.

4. How can I diagnose the issue causing OBDII code P0231 on my 2008 Ford Fusion?

- You can use a multimeter to test the voltage at the fuel pump, check the wiring and connectors for damage, inspect the fuel pump relay, and verify the integrity of the fuse.

5. What are some repair tips for fixing OBDII code P0231 on a 2008 Ford Fusion?

- Repair tips include replacing a faulty fuel pump, repairing or replacing damaged wiring or connectors, checking and replacing the fuel pump relay, and ensuring the fuse is in good condition.

6. Can driving with OBDII code P0231 on a 2008 Ford Fusion cause further damage?

- Driving with this code can potentially damage the fuel pump or lead to poor engine performance, so it's best to address the issue promptly.

7. Is it safe to continue driving my 2008 Ford Fusion with OBDII code P0231 present?

- It is not recommended to continue driving with this code active, as it could result in fuel delivery problems and potential breakdowns.

8. How much does it typically cost to repair OBDII code P0231 on a 2008 Ford Fusion?

- The cost of repairs can vary depending on the specific issue, but it may range from $200 to $600, including parts and labor.

9. Can I reset the OBDII code P0231 on my 2008 Ford Fusion myself?

- You can clear the code using an OBDII scanner, but it's crucial to address the underlying issue causing the code to prevent it from reoccurring.

10. Are there any recalls or technical service bulletins related to OBDII code P0231 on a 2008 Ford Fusion?

- It's advisable to check with Ford or consult online resources for any relevant recalls or technical service bulletins related to this specific issue.