P1237 1999 Ford F150 Code - Fuel Pump Secondary Circuit Fault
Quick Answer
Fuel Pump Driver Modules (FPDM) controls the voltage to the Fuel Pump in order to maintain proper fuel pressure over the full operating range of the engine. Common causes include Faulty Fuel Pump Driver Module (FPDM), Fuel Pump Driver Module (FPDM) harness is open or shorted, Fuel Pump Driver Module (FPDM) circuit poor electrical connection. 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 Faulty Fuel Pump Driver Module (FPDM), Fuel Pump Driver Module (FPDM) harness is open or shorted, Fuel Pump Driver Module (FPDM) circuit poor electrical connection.
- 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 P1237 1999 Ford F150 Description
What are the Possible Causes of the DTC P1237 1999 Ford F150?
- Faulty Fuel Pump Driver Module (FPDM)
- Fuel Pump Driver Module (FPDM) harness is open or shorted
- Fuel Pump Driver Module (FPDM) circuit poor electrical connection
- Faulty fuel pump
How to Fix the DTC P1237 1999 Ford F150?
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
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1237 1999 Ford F150 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 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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