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Engine-Codes – Generic – P1232

P1232 Code - Low Speed Fuel Pump Primary Circuit Failure

Quick Answer

The P1232 code indicates a Low Speed Fuel Pump Primary Circuit Failure, which means that there is an issue with the fuel pump circuit at low speeds. Common causes include Faulty fuel pump relay, Wiring issues in the fuel pump circuit, Malfunctioning 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
P1232 indicates Low Speed Fuel Pump Primary Circuit Failure.
Common causes
Common causes include Faulty fuel pump relay, Wiring issues in the fuel pump circuit, Malfunctioning 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P1232 Description

The P1232 code indicates a Low Speed Fuel Pump Primary Circuit Failure, which means that there is an issue with the fuel pump circuit at low speeds. The fuel pump is responsible for delivering fuel from the tank to the engine, and if this circuit fails, it can lead to a lack of proper fuel delivery to the engine. This can result in poor engine performance, stalling, or even the inability to start the vehicle. The fuel pump circuit failure can be caused by issues such as a faulty fuel pump relay, wiring problems, or a malfunctioning fuel pump itself. It is crucial to address this issue promptly to prevent potential long-term damage to the vehicle's engine and fuel system.

OBDII Code P1232 - Low Speed Fuel Pump Primary Circuit Failure
P1232 Code - Low Speed Fuel Pump Primary Circuit Failure

Common Causes of P1232

  1. Faulty fuel pump relay
  2. Wiring issues in the fuel pump circuit
  3. Malfunctioning fuel pump
  4. Poor electrical connections
  5. Fuel filter clogged or dirty

Symptoms of P1232

  1. Engine stalling at low speeds
  2. Difficulty starting the vehicle
  3. Engine misfires
  4. Reduced engine performance
  5. Check engine light illuminated

How to Fix P1232

  1. Diagnose the issue by checking the fuel pump relay, wiring, and fuel pump for any faults
  2. Replace the faulty fuel pump relay if necessary
  3. Repair or replace any damaged wiring in the fuel pump circuit
  4. Replace the fuel pump if it is found to be malfunctioning
  5. Clean or replace the fuel filter if it is clogged or dirty

Cost to Fix P1232

The cost of repairing a Low Speed Fuel Pump Primary Circuit Failure can vary depending on the specific issue causing the code, the make and model of the vehicle, and the labor rates in your area. In general, the cost of parts for this repair can range from $100 to $500, with labor costs adding an additional $100 to $300. Overall, you can expect to pay anywhere from $200 to $800 for this repair. It is advisable to consult with a professional mechanic to get an accurate cost estimate for your specific situation.

What does this mean?

Tech Notes for P1232

The Powertrain Control Module (PCM) monitors the Low Speed Fuel Pump (LFP) primary circuit output from the PCM. The test fails if: When the LFP circuit is commanded on (grounded), excessive current draw is detected on the LFP circuit; or when the LFP circuit is commanded off, voltage is not detected on the LFP circuit (the PCM expects to detect VPWR voltage coming through the low speed fuel pump relay coil to the LFP circuit).

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Code P1232 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1232 Code

No Frequently Asked Questions about P1232 Code found.

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  • My 2001 Model V35 Skyline (VQ25DD- Engine)sedan car last week suddenly popup check engine, its comes RPM 650-850 within the range. No any power losses in engine, my mechanics scan after showing P1232 code.
    We check Fuel pump regulator power is gone after check engine showing. We replace ECU and fuel pump relay but fault is not short it out.
    Kindly help me to resolve this matter.
    Thanks
    Jagath

    Reply to Comment

    • The P1232 code typically indicates an issue with the low-speed fuel pump primary circuit, which could involve wiring, connectors, the fuel pump control module, or the fuel pump itself. Here are some troubleshooting steps to help resolve the issue:

      1. Inspect Wiring and Connectors: Check for damaged, corroded, or loose wiring and connectors in the fuel pump circuit. Pay special attention to the fuel pump control module and the ground connections.

      2. Test the Fuel Pump Control Module: Ensure the control module is receiving and transmitting the proper signals. A faulty module can prevent the fuel pump from operating correctly.

      3. Verify Voltage Supply: Use a multimeter to check if the fuel pump is receiving proper voltage. No power reaching the fuel pump regulator, as you mentioned, suggests an issue upstream, such as a blown fuse, a bad relay (though you've replaced it), or a wiring fault.

      4. Inspect the Fuel Pump Itself: If the wiring, control module, and voltage supply are good, the fuel pump could be malfunctioning and may need replacement.

      5. Recheck the ECU: Even though you replaced the ECU, confirm it is programmed correctly for your vehicle and properly connected.

      Since you’ve already replaced the ECU and fuel pump relay, the next steps should focus on the wiring, fuel pump control module, and fuel pump. If you’re not confident handling electrical diagnostics, I recommend consulting a specialist familiar with Nissan Skyline vehicles.

      Let us know if you find anything in these areas!

      Reply to Comment