P1237 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 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 Description
What are the Possible Causes of the DTC P1237?
- 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?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1237 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 P1237 code?
Need more information on how to fix the P1237 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1237 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1237 Audi — Injector Circuit Open Cylinder 1
- P1237 Buick — Injector Circuit Cylinder 6 Intermittent
- P1237 Cadillac — Injector Circuit Cylinder 6 Intermittent
- P1237 Chevrolet — Injector Circuit Cylinder 6 Intermittent
- P1237 Ford — Fuel Pump Secondary Circuit Fault
- P1237 GMC — Injector Circuit Cylinder 6 Intermittent
- P1237 Isuzu — High Fuel Pressure Regulator Circuit Shorted To Ground
- P1237 Lincoln — Fuel Pump Secondary Circuit Fault
- P1237 Mazda — Fuel Pump Driver Module Disabled Or Off Line
- P1237 Mercury — Fuel Pump Secondary Circuit Fault
- P1237 Mitsubishi — Accelerator Pedal Position Sensor Plausibility
- P1237 Saab — Intake Manifold Air Control Solenoid Outer Flap Open Circuit/Short To Positive
- P1237 Volkswagen — Injector Circuit Open Cylinder 1
Frequently Asked Questions about P1237 Code
1. What are the common symptoms of OBDII code P1237 (Fuel Pump Secondary Circuit Fault)?
- Common symptoms include loss of power, engine stalling, difficulty starting the vehicle, and illuminated check engine light.
2. What are the possible causes of OBDII code P1237?
- Possible causes include a faulty fuel pump relay, damaged wiring or connectors in the fuel pump circuit, a failed fuel pump driver module, or a defective fuel pump.
3. How can I diagnose the Fuel Pump Secondary Circuit Fault (P1237)?
- Diagnosis typically involves checking the fuel pump relay, inspecting the wiring and connectors for damage, testing the fuel pump driver module, and verifying the fuel pump's operation.
4. Can a bad fuel filter trigger the P1237 trouble code?
- While a clogged fuel filter can lead to fuel delivery issues, it is not a direct cause of the P1237 code. Focus on checking the fuel pump circuit components for faults.
5. Is it safe to continue driving with the P1237 error code present?
- It is not recommended to continue driving with the P1237 code active, as it can lead to potential fuel delivery problems and engine performance issues. Prompt diagnosis and repair are advised.
6. How much does it typically cost to repair the Fuel Pump Secondary Circuit Fault (P1237)?
- The cost of repair can vary depending on the underlying issue, but it may range from $200 to $800, including parts and labor. Costs can increase if the fuel pump itself needs to be replaced.
7. Can a DIY enthusiast fix the P1237 code, or should I seek professional help?
- DIY enthusiasts with automotive repair experience can attempt to diagnose and repair the P1237 code. However, if you are unfamiliar with electrical systems, it may be best to seek professional help.
8. Are there any preventive maintenance measures to avoid the P1237 trouble code?
- Regularly inspecting the fuel pump circuit components, such as the relay, wiring, and connectors, can help prevent issues that may trigger the P1237 code. Maintaining proper fuel system health is essential.
9. Will resetting the check engine light make the P1237 code disappear permanently?
- Resetting the check engine light may temporarily clear the code, but if the underlying issue causing the P1237 code is not addressed, it is likely to reappear once the fault is detected again.
10. Can extreme weather conditions affect the occurrence of the Fuel Pump Secondary Circuit Fault (P1237)?
- Extreme weather conditions, such as high temperatures, can sometimes exacerbate existing fuel pump circuit issues and lead to the triggering of the P1237 code. It is essential to address any underlying problems promptly.
Discuss the causes and fixes for P1237 OBDII Code
-
P1237 - Volvo is a Low vacuum problem Possible cause: check vacuum circuit, check turbo, check vacuum connections to turbo
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
