AutoCodes – Ford – P0231 2010 Ford Fusion

P0231 2010 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 2010 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,689

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0231 2010 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 2010 Ford Fusion - Fuel Pump Secondary Circuit Low - AutoCodes.com — P0231 2010 Ford Fusion Code - Fuel Pump Secondary Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0231 2010 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 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 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 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.

Need more information about the P0231 2010 Ford Fusion code?

Need more information on how to fix the P0231 2010 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0231 2010 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 2010 Ford Fusion Code

1. What are the common symptoms of OBDII code P0231 on a 2010 Ford Fusion?

The common symptoms include engine stalling, difficulty starting the vehicle, reduced power, and the Check Engine light turning on.

2. What does the OBDII code P0231 "Fuel Pump Secondary Circuit Low" indicate in a 2010 Ford Fusion?

This code indicates that the fuel pump secondary circuit is registering a low voltage condition, which can affect the fuel delivery system's performance.

3. What are the possible causes of OBDII code P0231 on a 2010 Ford Fusion?

Potential causes include a faulty fuel pump relay, damaged wiring or connectors in the fuel pump circuit, a failing fuel pump, or a problem with the vehicle's PCM (powertrain control module).

4. How can I diagnose the OBDII code P0231 on my 2010 Ford Fusion?

Diagnosis typically involves checking the fuel pump relay, inspecting the wiring and connectors for damage, testing the fuel pump's voltage and current draw, and scanning the PCM for any related fault codes.

5. Can I continue driving my 2010 Ford Fusion with OBDII code P0231?

It is not recommended to drive the vehicle with this code active, as it can lead to potential fuel delivery issues and engine performance problems, which may result in further damage.

6. How can I repair OBDII code P0231 on my 2010 Ford Fusion?

Repair options may include replacing the fuel pump relay, repairing or replacing damaged wiring or connectors, replacing the fuel pump if necessary, or reprogramming the PCM if a software issue is suspected.

7. Will resetting the Check Engine light resolve OBDII code P0231 on my 2010 Ford Fusion?

Simply resetting the Check Engine light will not fix the underlying issue causing the code. Proper diagnosis and repair are necessary to address the root cause of the problem.

8. Is OBDII code P0231 a common issue in 2010 Ford Fusion vehicles?

While it may not be extremely common, experiencing code P0231 in a 2010 Ford Fusion is not unheard of, especially as the vehicle ages and components wear out.

9. Can a DIY enthusiast fix OBDII code P0231 on a 2010 Ford Fusion?

Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and repair code P0231 themselves, especially if they have experience working on automotive electrical systems.

10. How much does it typically cost to repair OBDII code P0231 on a 2010 Ford Fusion?

The cost of repair can vary depending on the specific cause of the issue and whether professional help is needed. Costs may range from replacing a relay or fuse to more extensive repairs involving the fuel pump or PCM.