How to Fix B1356 Ignition Run Circuit Open

Introduction

If you’re experiencing issues with your car’s ignition system, specifically the B1356 code, you’re not alone. This code indicates that there is an open circuit in the ignition run circuit, which can cause a variety of problems. Fortunately, fixing this issue is relatively straightforward and can be done with a few simple steps.

Step 1: Check the Battery

The first thing you should do when you encounter the B1356 code is to check your car’s battery. A weak or dead battery can cause a variety of electrical issues, including an open circuit in the ignition run circuit. Use a multimeter to check the voltage of your battery. If it’s below 12 volts, you may need to replace it.

Step 2: Inspect the Ignition Switch

If your battery is in good condition, the next step is to inspect the ignition switch. The ignition switch is responsible for sending power to the starter and other electrical components in your car. If it’s faulty, it can cause an open circuit in the ignition run circuit. Use a multimeter to check the continuity of the ignition switch. If it’s not working properly, you may need to replace it.

Step 3: Check the Wiring

If the battery and ignition switch are both in good condition, the next step is to check the wiring. A damaged or broken wire can cause an open circuit in the ignition run circuit. Use a multimeter to check the continuity of the wiring. If you find a damaged wire, you’ll need to repair or replace it.

Step 4: Replace the PCM

If none of the above steps resolve the issue, the problem may be with the Powertrain Control Module (PCM). The PCM is responsible for controlling the ignition system and other electrical components in your car. If it’s faulty, it can cause an open circuit in the ignition run circuit. You’ll need to replace the PCM to fix the issue.

Conclusion

Fixing the B1356 code is relatively straightforward and can be done with a few simple steps. By checking your car’s battery, ignition switch, wiring, and PCM, you can identify and resolve the issue quickly and easily.

FAQs

1. Can I drive my car with the B1356 code?

It’s not recommended to drive your car with the B1356 code. This code indicates that there is an open circuit in the ignition run circuit, which can cause a variety of problems. It’s best to address the issue as soon as possible to avoid further damage to your car.

2. How much does it cost to fix the B1356 code?

The cost of fixing the B1356 code will depend on the specific issue causing the problem. If it’s a simple fix like a dead battery or damaged wire, it may only cost a few hundred dollars. If the issue is with the PCM, it could cost upwards of $1,000 to replace.

3. Can I fix the B1356 code myself?

If you have experience working on cars and the necessary tools, you may be able to fix the B1356 code yourself. However, if you’re not confident in your abilities, it’s best to take your car to a professional mechanic to avoid causing further damage.