P1237 1999 Ford F150 Code - Fuel Pump Secondary Circuit Fault
Quick Answer
The P1237 diagnostic trouble code (DTC) for a 1999 Ford F150 relates to a fault in the vehicle's fuel pump secondary circuit. Common causes include Corrosion or damage to the wiring or connectors in the fuel pump circuit, A faulty fuel pump relay, Electrical issues such as a blown fuse or short circuit. 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
- P1237 1999 Ford F150 indicates Fuel Pump Secondary Circuit Fault.
- Common causes
- Common causes include Corrosion or damage to the wiring or connectors in the fuel pump circuit, A faulty fuel pump relay, Electrical issues such as a blown fuse or short circuit.
- 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 P1237 1999 Ford F150 Description
The P1237 diagnostic trouble code (DTC) for a 1999 Ford F150 relates to a fault in the vehicle's fuel pump secondary circuit. This code indicates that there is an issue with the electrical circuit responsible for powering the fuel pump. The fuel pump is a critical component of the vehicle's fuel delivery system, as it is responsible for pumping fuel from the fuel tank to the engine. When the fuel pump secondary circuit malfunctions, it can lead to a variety of performance issues and potentially cause the vehicle to break down.
Common Causes of P1237 1999 Ford F150
- Corrosion or damage to the wiring or connectors in the fuel pump circuit
- A faulty fuel pump relay
- Electrical issues such as a blown fuse or short circuit
- A malfunctioning fuel pump
- Poor electrical connection or ground
Symptoms of P1237 1999 Ford F150
- Engine stalling or hesitation during acceleration
- Difficulty starting the engine
- Engine misfires or rough idling
- Reduced fuel efficiency
- Check engine light illuminated on the dashboard
How to Fix P1237 1999 Ford F150
- Begin by conducting a visual inspection of the wiring, connectors, and components in the fuel pump secondary circuit to look for any signs of damage, corrosion, or loose connections.
- Use a multimeter to test the continuity and voltage in the fuel pump circuit to identify any electrical issues that may be causing the fault.
- Check the fuel pump relay and replace it if necessary.
- If the fuel pump is found to be faulty, it will need to be replaced with a new unit.
- After completing the repair, clear the diagnostic trouble codes and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P1237 1999 Ford F150
The typical repair costs for a fuel pump secondary circuit fault can range from $200 to $600, including parts and labor. However, the actual cost may vary depending on the specific diagnosis time and labor rates at auto repair shops. It's advisable to check with local shops for a more accurate estimate based on your location, vehicle make and model, and engine type. Keep in mind that rates can differ between dealerships, independent shops, and metropolitan areas.
Tech Notes for P1237 1999 Ford F150
P1237 indicates that the FPDM has detected a fuel pump secondary circuit fault. The FPDM will send a message to the PCM through the FPM circuit, indicating that this failure has been detected. The PCM will set the DTC when the message is received.
When is the Code Detected?
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Frequently Asked Questions about P1237 1999 Ford F150 Code
1. What does the OBDII code P1237 mean on a 1999 Ford F150?
P1237 indicates a "Fuel Pump Secondary Circuit Fault," meaning there is an issue in the electrical circuit controlling the fuel pump.
2. What are the common symptoms of code P1237 in a 1999 Ford F150?
Symptoms may include engine stalling, rough idling, hesitation during acceleration, or failure to start.
3. What causes the P1237 code to appear on a 1999 Ford F150?
Common causes include a faulty fuel pump driver module, wiring issues, corroded connectors, or a failing fuel pump.
4. Can I drive my 1999 Ford F150 with code P1237?
Driving is not recommended as the fuel pump may fail, leading to engine stalling and potential safety risks.
5. How do I diagnose the P1237 code on my 1999 Ford F150?
Start by inspecting the wiring and connectors for damage or corrosion, then test the fuel pump driver module and fuel pump for proper operation.
6. What is the fuel pump driver module, and how does it relate to code P1237?
The fuel pump driver module controls power to the fuel pump. If it fails, it can trigger the P1237 code.
7. How can I fix the P1237 code on a 1999 Ford F150?
Repairs may include replacing the fuel pump driver module, repairing damaged wiring, cleaning connectors, or replacing the fuel pump.
8. How much does it cost to repair code P1237 on a 1999 Ford F150?
Costs vary depending on the issue, ranging from $100 for wiring repairs to $500–$800 for a fuel pump replacement.
9. Can a bad fuel pump cause the P1237 code on my 1999 Ford F150?
Yes, a failing fuel pump can cause the code if it prevents the secondary circuit from functioning properly.
10. Will clearing the P1237 code fix the problem on my 1999 Ford F150?
No, clearing the code will only reset the warning temporarily. The underlying issue must be diagnosed and repaired.
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