How to Fix P0234 Fuel Pump Secondary Circuit Intermittent

Introduction

If you’re experiencing the P0234 error code on your vehicle, it means that there is an issue with the fuel pump secondary circuit. This can be a frustrating problem to deal with, but fortunately, it’s not too difficult to fix. In this article, we’ll go over the steps you need to take to resolve this issue and get your vehicle back on the road.

Step 1: Check the Fuel Pump Relay

The first thing you should do when you encounter the P0234 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 stop working, which will trigger the P0234 error code.

To check the fuel pump relay, you’ll need to locate it in your vehicle’s fuse box. Once you’ve found it, remove it from the fuse box and inspect it for any signs of damage or wear. If the relay looks fine, you can test it using a multimeter. Set the multimeter to the continuity setting and touch the probes to the relay’s terminals. If the multimeter beeps, the relay is working correctly. If it doesn’t beep, you’ll need to replace the relay.

Step 2: Check the Fuel Pump Wiring

If the fuel pump relay is working correctly, the next thing you should check is the fuel pump wiring. Over time, the wiring can become damaged or corroded, which can cause the fuel pump to stop working.

To check the wiring, you’ll need to locate the fuel pump and inspect the wires that connect to it. Look for any signs of damage or wear, such as frayed wires or corroded connectors. If you find any issues, you’ll need to repair or replace the wiring.

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. Over time, the fuel pump can become worn or damaged, which can cause it to stop working.

To check the fuel pump, you’ll need to remove it from your vehicle and inspect it for any signs of damage or wear. Look for things like cracks in the housing or worn bearings. If you find any issues, you’ll need to replace the fuel pump.

Step 4: Clear the Error Code

Once you’ve fixed the issue with your fuel pump, you’ll need to clear the P0234 error 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

Dealing with the P0234 error code can be frustrating, but with the right steps, you can fix the issue and get your vehicle back on the road. By checking the fuel pump relay, wiring, and pump itself, you can identify and resolve the issue causing the error code.

FAQs

1. Can I drive my vehicle with the P0234 error code?

It’s not recommended to drive your vehicle with the P0234 error code. This code indicates an issue with the fuel pump, which can cause your vehicle to stall or stop running altogether.

2. How much does it cost to fix the P0234 error code?

The cost to fix the P0234 error code will depend on the cause of the issue. If it’s a simple fix like a faulty relay, it may only cost a few dollars to replace. If the fuel pump needs to be replaced, the cost can range from a few hundred to a few thousand dollars.

3. How can I prevent the P0234 error code from happening again?

To prevent the P0234 error code from happening again, it’s important to keep up with regular maintenance on your vehicle. This includes things like changing the fuel filter and checking the fuel pump regularly for signs of wear or damage.