How to Fix B1357 Ignition Run Circuit Short to Battery

Introduction

If you’re experiencing issues with your car’s ignition system, specifically the B1357 code, you may be wondering what steps you can take to fix the problem. This code indicates that there is a short circuit in the ignition run circuit, which can cause a variety of issues with your vehicle’s performance. Fortunately, there are several steps you can take to diagnose and fix this problem on your own.

Step 1: Check the Battery

The first step in fixing the B1357 code is to check your car’s battery. A weak or dead battery can cause a variety of issues with your vehicle’s electrical system, including a short circuit in the ignition run circuit. Use a voltmeter to check the voltage of your battery. If it’s below 12 volts, you may need to replace it.

Step 2: Check the Wiring

If your battery is in good condition, the next step is to check the wiring in your car’s ignition system. Look for any frayed or damaged wires that may be causing a short circuit. You can use a multimeter to test the continuity of each wire in the ignition run circuit. If you find a wire that has no continuity, it may be the source of the problem.

Step 3: Check the Ignition Switch

If the wiring in your car’s ignition system is in good condition, the next step is to check the ignition switch. The ignition switch is responsible for sending power to the starter motor and other components in the ignition system. Use a multimeter to test the continuity of the ignition switch. If it’s not working properly, you may need to replace it.

Step 4: Check the Starter Motor

If the ignition switch is in good condition, the next step is to check the starter motor. The starter motor is responsible for turning the engine over when you turn the key in the ignition. Use a multimeter to test the continuity of the starter motor. If it’s not working properly, you may need to replace it.

Step 5: Check the PCM

If all of the above steps have been completed and the B1357 code is still present, the final step is to check the Powertrain Control Module (PCM). The PCM is responsible for controlling the ignition system and other components in your car’s engine. Use a scan tool to check for any error codes in the PCM. If there are any error codes present, you may need to replace the PCM.

Conclusion

Fixing the B1357 code can be a complex process, but by following these steps, you can diagnose and fix the problem on your own. Remember to always use caution when working on your car’s electrical system and consult a professional if you’re unsure about any of the steps.

FAQs

1. Can I drive my car with the B1357 code?

It’s not recommended to drive your car with the B1357 code present. This code indicates that there is a short circuit in the ignition run circuit, which can cause a variety of issues with your vehicle’s performance.

2. How much does it cost to fix the B1357 code?

The cost to fix the B1357 code can vary depending on the cause of the problem. If it’s a simple fix, such as replacing a wire or the ignition switch, it may only cost a few hundred dollars. However, if the problem is more complex, such as a faulty PCM, it could cost upwards of $1,000.

3. Can I fix the B1357 code on my own?

While it’s possible to fix the B1357 code on your own, it’s important to have a good understanding of your car’s electrical system and to use caution when working on it. If you’re unsure about any of the steps, it’s best to consult a professional.