B1352 code — how to fix error fast

With most OBD2 codes, you can expect the underlying issue to affect the engine or transmission in some way. However, there are some exceptions like the B1352 code and this guide will deal with the overall B1352 code meaning and possible fixes from our team’s perspective.

We hope to be able to help drivers deal with this seemingly strange code and to do that, our team will start from scratch and discuss the main reasons, as well as give you some tips on diagnosis and prevention.

Why you can trust REREV’s OBD2 code advice: Our automotive expert researchers with experienced mechanics undertakes a thorough research methodology to deliver precise insights on OBD codes. Find out more about OBD2 codes research process..

What does the B1352 code mean?

The B1352 code is a diagnostic trouble code (DTC) that indicates a fault in the ignition key-in circuit. This code is usually the result of a malfunctioning ignition switch or a related component. When the B1352 code is triggered, it can affect various systems in your vehicle, such as the immobilizer system, anti-theft system, and starter circuit.

One of the most common symptoms of the B1352 code is difficulty starting the vehicle. Other symptoms include intermittent stalling, loss of power, and the check engine light illuminating on the dashboard.

What causes the B1352 code?

There are several potential causes of the code, including a faulty ignition switch, damaged wiring or connectors in the key-in circuit, or a malfunctioning immobilizer or anti-theft system. Let’s take a closer look at each of these causes.

Faulty ignition switch

The ignition switch is responsible for sending power to various systems in your vehicle, including the starter circuit. If the switch is faulty, it can cause the B1352 code to be triggered.

In this case, replacing the ignition switch is the most common solution.

Damaged wiring or connectors

Wiring and connectors in the key-in circuit can become damaged over time, leading to the B1352 code. This damage can be caused by a variety of factors, such as exposure to the elements or wear and tear.

Malfunctioning immobilizer or anti-theft system

In some cases, the B1352 code can be triggered by a malfunctioning immobilizer or anti-theft system. These systems are designed to prevent unauthorized access to your vehicle, but if they malfunction, they can cause the code to appear.

Which car models does the B1352 code affect the most?

The B1352 code can affect a wide range of vehicles, but some models are more susceptible to this issue than others. Ford vehicles, in particular, are known to experience the code, but here’s a more detailed view of the commonly affected cars:

• Ford Focus: The Ford Focus is one of the car models most commonly associated with the B1352 error code. This is likely due to a faulty wiring harness or a bad ignition switch, both of which can cause this error code to appear.
• Ford Escort: Another Ford model that is prone to experiencing this error code is the Escort. Like the Focus, this model may experience issues with its wiring harness or ignition switch.
• Mazda 626: The Mazda 626 is another car model that may be affected by this error code. This error code may be caused by a malfunctioning ignition lock cylinder or a bad ignition switch.

How to diagnose the B1352 code

Diagnosing the B1352 code requires specialized diagnostic tools and equipment. However, there are some steps you can take even before visiting a mechanic, so here’s a complete overview of the diagnostic methods:

Use an OBD scanner

The first step in diagnosing the B1352 error code is to use a diagnostic scanner to read the code and any other related codes that may have been stored in the car’s computer system. This can help identify any underlying issues that may be causing the problem.

Inspect the wiring harness

One of the most common causes of this error code is a faulty wiring harness. Your mechanic may visually inspect the wiring harness and connectors to look for signs of fraying, corrosion, or other damage.

Check the ignition switch

Another potential cause of the code is a bad ignition switch. You can test the switch using a multimeter to check for continuity and proper voltage levels.

Inspect the ignition lock cylinder

In some cases, this error code may be caused by a malfunctioning ignition lock cylinder. It could be the reason why you are having difficulties starting your car with the original key, so checking it can provide some answers.

How to fix the B1352 code

The cost to fix the code varies depending on the specific cause of the issue. In general, repairing or replacing the ignition switch is the most expensive solution, while repairing damaged wiring or connectors is less expensive.

You’ll know the overall price once you diagnose the code properly and apply one of the following solutions:

Repair or replace the wiring harness

If a faulty wiring harness is causing the error code, the mechanic may repair or replace the damaged wires and connectors. This may involve splicing in new wires, replacing corroded connectors, or repairing broken insulation.

Replace the ignition switch

If the ignition switch is found to be faulty, it may need to be replaced entirely. This will typically involve removing the old switch and installing a new one.

Replace the ignition lock cylinder

In cases where a bad ignition lock cylinder may be causing the B1352 error code, this component may need to be replaced to resolve the issue.

How to prevent the B1352 code

Preventing the code requires proper maintenance of your vehicle’s ignition system. Here are some preventive measures you can take:

• Have your vehicle regularly serviced by a qualified mechanic
• Replace the ignition switch at the first sign of trouble
• Inspect the wiring and connectors in the key-in circuit regularly for damage or wear

By following these preventive measures, you can help ensure that your vehicle’s ignition system remains in good working condition and avoid the B1352 code.

Our take

Ultimately, you could see from this guide how something seemingly irrelevant as this OBD2 code could lead to serious problems starting your car. So, make sure to use the steps outlined in this article to properly fix things and prevent the code from re-emerging.