How to Fix P1240 Fuel Pump Control Out of Range

Introduction

If you’re experiencing the P1240 error code on your vehicle, it means that the fuel pump control circuit is out of range. This can cause a variety of issues, including poor fuel economy, engine misfires, and even stalling. Fortunately, fixing this problem is relatively simple and can be done at home with a few basic tools.

Step 1: Check the Fuel Pump Relay

The first thing you should do when trying to fix the P1240 error code is to check the fuel pump relay. This is a small device that controls the flow of electricity to the fuel pump. If the relay is faulty, it can cause the fuel pump to malfunction, which can trigger the P1240 error code.

To check the fuel pump relay, locate it in your vehicle’s fuse box. The fuse box is usually located under the hood or in the dashboard. Once you’ve found the fuel pump relay, remove it from the fuse box and inspect it for any signs of damage or wear. If the relay looks damaged, you’ll need to replace it.

Step 2: Check the Fuel Pump Wiring

If the fuel pump relay is in good condition, the next thing you should check is the fuel pump wiring. The wiring connects the fuel pump to the rest of the vehicle’s electrical system. If the wiring is damaged or corroded, it can cause the fuel pump to malfunction, which can trigger the P1240 error code.

To check the fuel pump wiring, start by inspecting the wires for any signs of damage or wear. If you notice any damage, you’ll need to replace the affected wires. You should also check the connections between the wiring and the fuel pump and make sure they’re secure.

Step 3: Check the Fuel Pump

If the fuel pump relay and wiring are both in good condition, the next thing you should check is the fuel pump itself. The fuel pump is responsible for delivering fuel to the engine, and if it’s not working properly, it can cause a variety of issues, including the P1240 error code.

To check the fuel pump, you’ll need to locate it in your vehicle. The fuel pump is usually located in the fuel tank, so you may need to remove the tank to access it. Once you’ve located the fuel pump, inspect it for any signs of damage or wear. If the fuel pump looks damaged, you’ll need to replace it.

Step 4: Clear the Error Code

Once you’ve fixed the underlying issue causing the P1240 error code, you’ll need to clear the code from your vehicle’s computer. To do this, you’ll need an OBD-II scanner. Simply connect the scanner to your vehicle’s OBD-II port and follow the instructions to clear the error code.

Conclusion

Fixing the P1240 error code is relatively simple and can be done at home with a few basic tools. By checking the fuel pump relay, wiring, and pump itself, you can identify and fix the underlying issue causing the error code. Once you’ve fixed the issue, be sure to clear the error code from your vehicle’s computer to prevent it from reoccurring.

FAQs

1. Can I drive my vehicle with the P1240 error code?

While it’s technically possible to drive your vehicle with the P1240 error code, it’s not recommended. The error code indicates that there’s an issue with the fuel pump control circuit, which can cause a variety of issues, including poor fuel economy, engine misfires, and even stalling. It’s best to fix the issue as soon as possible to prevent further damage to your vehicle.

2. How much does it cost to fix the P1240 error code?

The cost of fixing the P1240 error code will depend on the underlying issue causing the code. If the issue is with the fuel pump relay or wiring, the cost should be relatively low. However, if the issue is with the fuel pump itself, the cost can be significantly higher. It’s best to get a quote from a mechanic or repair shop to determine the exact cost.

3. How can I prevent the P1240 error code from occurring?

To prevent the P1240 error code from occurring, it’s important to maintain your vehicle’s fuel system. This includes regularly replacing the fuel filter, using high-quality fuel, and avoiding running your vehicle on an empty tank. It’s also important to address any issues with the fuel system as soon as they arise to prevent further damage to your vehicle.