What is OBD-II Code P085B – Gear Shift Control Module B Communication Circuit Low

Section 1: Understanding OBD-II Codes

If you’re a car owner, you’ve probably heard of an OBD-II code. OBD stands for On-Board Diagnostics and is a system that monitors your car’s emissions, performance, and systems. When something goes wrong in your car, it will trigger a code that will alert you to the issue.

OBD-II codes are standardized codes that are used by all auto manufacturers in the United States, and they can be read by a diagnostic tool that is plugged into your car’s OBD-II port. These codes can also be used to help mechanics diagnose and repair issues with your car.

Section 2: Understanding Gear Shift Control Modules

Gear shift control modules are an important component of modern cars with automatic transmissions. These modules are responsible for controlling the shifting of gears and ensuring that the transmission shifts smoothly and efficiently.

There are a number of different components in a gear shift control module, including sensors, electrical connections, and programming. If any of these components fail or malfunction, it can result in issues with your car’s performance.

Section 3: What is OBD-II Code P085B?

OBD-II Code P085B refers to a low communication circuit in the gear shift control module B. This code indicates that there is an issue with the communication between the gear shift control module and the transmission control module.

As a result of this issue, you may experience a number of symptoms in your car. These can include delayed or rough shifting, hesitation when accelerating, or even the transmission going into a limp mode.

Section 4: Diagnosis and Repair of OBD-II Code P085B

Diagnosing and repairing OBD-II Code P085B can be a complex process that requires knowledge and expertise in auto repair. In general, the diagnostic process will involve using a diagnostic tool to read the code and identify the specific issue that is causing the problem.

Once the issue has been identified, the repair process can begin. This may involve replacing faulty components, repairing damaged wiring or connections, or reprogramming the gear shift control module.

It’s important to note that attempting to diagnose or repair OBD-II Code P085B without the proper tools and knowledge can cause further damage to your car. It’s always best to seek the help of a qualified mechanic who can diagnose and repair the issue correctly.

Section 5: Frequently Asked Questions

Q: How do I know if my car has an OBD-II port?
A: All cars manufactured in the United States after 1996 are required to have an OBD-II port. It is typically located under the dashboard on the driver’s side of the car.

Q: Can I continue to drive my car if it has OBD-II Code P085B?
A: It is not recommended to continue driving your car if it has OBD-II Code P085B. This code indicates an issue with the transmission shifting, which can cause further damage if left untreated.

Q: How much will it cost to repair OBD-II Code P085B?
A: The cost of repairing OBD-II Code P085B will depend on the specific issue that is causing the problem. In general, repairs can range from a few hundred to a few thousand dollars.

Q: Can I reset the OBD-II code myself?
A: While it is possible to reset the OBD-II code yourself using a diagnostic tool, it is not recommended. This code is an important indicator of issues with your car, and resetting it without addressing the underlying issue can cause further damage.

Q: How can I prevent OBD-II Code P085B from occurring?
A: Regular maintenance of your car’s transmission and gear shift control module can help prevent issues that can lead to OBD-II Code P085B. This includes regular fluid changes and inspections by a qualified mechanic.

Section 6: Resources for Further Reading

– OBD-II Code Lookup Tool: A free tool for identifying OBD-II codes and their meanings.
– Transmission Repair Cost Guide: A guide to the cost of repairing common transmission issues.
– How Transmission Control Modules Work: An in-depth look at how transmission control modules function.

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