P0231 2011 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 2011 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.
Code P0231 2011 Ford Fusion Description
What are the Possible Causes of the DTC P0231 2011 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 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.
Code Tech Notes
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 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 P0231 2011 Ford Fusion Code
1. What does the OBDII code P0231 mean for a 2011 Ford Fusion?
The P0231 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the fuel pump secondary circuit.
2. What are the common symptoms of the P0231 code in a Ford Fusion?
Symptoms include difficulty starting the engine, stalling, poor engine performance, and the Check Engine Light being illuminated.
3. What causes the P0231 code to appear in a 2011 Ford Fusion?
Common causes include a faulty fuel pump relay, damaged wiring or connectors in the fuel pump circuit, or a failing fuel pump.
4. Can a faulty fuel pump cause the P0231 code?
Yes, a failing or malfunctioning fuel pump can cause low voltage in the secondary circuit, triggering the P0231 code.
5. How do I diagnose the P0231 code in my Ford Fusion?
Start by inspecting the wiring and connectors in the fuel pump circuit for damage or corrosion. Then, test the fuel pump relay and fuel pump for proper operation.
6. Is the P0231 code safe to ignore?
No, ignoring the P0231 code can lead to engine performance issues, stalling, or difficulty starting, potentially leaving you stranded.
7. How can I fix the P0231 code on a 2011 Ford Fusion?
Repairs may involve replacing a faulty fuel pump relay, repairing damaged wiring or connectors, or replacing the fuel pump if it’s defective.
8. Can a blown fuse cause the P0231 code?
Yes, a blown fuel pump fuse can interrupt the circuit and result in low voltage, triggering the P0231 code.
9. How much does it cost to fix a P0231 code on a Ford Fusion?
The cost varies depending on the repair, but replacing a fuel pump relay typically costs $50–$150, while a fuel pump replacement can range from $300–$700.
10. Can a weak battery cause the P0231 code?
While unlikely, a weak or failing battery can contribute to electrical issues and should be tested to rule out any contributing factors.
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