How to Fix B1278 Servo Motor Potentiometer Foot Circuit Short to Battery

Introduction

If you’re experiencing the B1278 error code on your car, it means that there’s a problem with the servo motor potentiometer foot circuit. This can be a frustrating issue to deal with, but fortunately, it’s something that you can fix on your own with a little bit of know-how. In this article, we’ll walk you through the steps you need to take to fix the B1278 error code and get your car back on the road.

Step 1: Diagnose the Problem

Before you can fix the B1278 error code, you need to diagnose the problem. This can be done using an OBD-II scanner, which will give you a code that corresponds to the problem. In this case, the code will be B1278. Once you have the code, you can start to troubleshoot the issue.

Step 2: Check the Wiring

The first thing you should do is check the wiring for any signs of damage or wear. Look for frayed wires, loose connections, or any other issues that could be causing the problem. If you find any issues, you’ll need to repair or replace the wiring as necessary.

Step 3: Check the Potentiometer

If the wiring looks good, the next step is to check the potentiometer. This is a small device that measures the position of the servo motor. To check the potentiometer, you’ll need to use a multimeter to test the resistance. If the resistance is outside of the normal range, you’ll need to replace the potentiometer.

Step 4: Check the Servo Motor

If the wiring and potentiometer both look good, the next step is to check the servo motor. This is the device that controls the movement of the throttle. To check the servo motor, you’ll need to use a multimeter to test the voltage. If the voltage is outside of the normal range, you’ll need to replace the servo motor.

Step 5: Replace the Faulty Component

Once you’ve identified the faulty component, you’ll need to replace it. This can be done using basic hand tools and a little bit of know-how. If you’re not comfortable working on your car, it’s best to take it to a professional mechanic.

Step 6: Clear the Error Code

After you’ve replaced the faulty component, you’ll need to clear the error code. This can be done using an OBD-II scanner or by disconnecting the battery for a few minutes. Once the error code has been cleared, you can start your car and make sure that the problem has been fixed.

Conclusion

Fixing the B1278 error code can be a frustrating experience, but with a little bit of know-how, it’s something that you can do on your own. By following the steps outlined in this article, you can diagnose the problem, identify the faulty component, and replace it. With a little bit of patience and persistence, you can get your car back on the road in no time.

FAQs

1. Can I drive my car with the B1278 error code?

It’s not recommended to drive your car with the B1278 error code. This code indicates a problem with the servo motor potentiometer foot circuit, which can affect the performance of your car. It’s best to fix the problem before driving your car.

2. How much does it cost to fix the B1278 error code?

The cost to fix the B1278 error code will depend on the extent of the problem and the cost of the replacement parts. If you’re comfortable working on your car, you can save money by doing the repairs yourself.

3. How long does it take to fix the B1278 error code?

The time it takes to fix the B1278 error code will depend on the extent of the problem and your level of experience. If you’re comfortable working on your car, you can typically fix the problem in a few hours. If you’re not comfortable working on your car, it’s best to take it to a professional mechanic.