P1237 Mercury Code - Fuel Pump Secondary Circuit Fault
Quick Answer
The P1237 diagnostic trouble code (DTC) for Mercury vehicles indicates a fault in the fuel pump secondary circuit. Common causes include Faulty fuel pump relay, Wiring issues in the fuel pump circuit, Defective fuel pump. 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 Mercury indicates Fuel Pump Secondary Circuit Fault.
- Common causes
- Common causes include Faulty fuel pump relay, Wiring issues in the fuel pump circuit, Defective fuel pump.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1237 Mercury Description
The P1237 diagnostic trouble code (DTC) for Mercury vehicles indicates a fault in the fuel pump secondary circuit. The fuel pump secondary circuit is responsible for providing power to the fuel pump relay, which in turn controls the fuel pump's operation. When this circuit experiences a fault, it can lead to issues with the fuel delivery system, potentially causing the engine to run lean or rich, leading to poor performance and fuel economy. This code can trigger the vehicle's check engine light and should be addressed promptly to prevent further damage to the fuel system.
Common Causes of P1237 Mercury
- Faulty fuel pump relay
- Wiring issues in the fuel pump circuit
- Defective fuel pump
- Corrosion or poor connections in the circuit
- Issues with the vehicle's PCM (powertrain control module)
Symptoms of P1237 Mercury
- Check engine light is illuminated
- Engine stalling or hesitation
- Difficulty starting the engine
- Reduced fuel efficiency
- Loss of power while driving
How to Fix P1237 Mercury
- Diagnose the issue using a scan tool to confirm the P1237 code and pinpoint the exact cause.
- Inspect the fuel pump relay, wiring, and connections for any signs of damage or corrosion.
- Test the fuel pump's operation to determine if it is functioning properly.
- Replace the faulty fuel pump relay, repair or replace damaged wiring, or replace the fuel pump as needed.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1237 Mercury
The cost of repairing a fuel pump secondary circuit fault can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $200 to $600 for parts and labor. Keep in mind that diagnostic time, parts prices, and labor rates can differ between auto repair shops, so it's recommended to obtain quotes from multiple sources to get the most accurate estimate for your specific situation.
When is the Code Detected?
Need more information about the P1237 Mercury code?
Need more information on how to fix the P1237 Mercury code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1237 Mercury code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1237 Mercury Code
No Frequently Asked Questions about P1237 Mercury Code found.
Discuss the causes and fixes for P1237 Mercury OBDII Code
Code P1237 Mercury comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.