U0140 Code: Lost Communication With Body Control Module

Your vehicle has a body control module (BCM) that receives information from different switches and sensors scattered throughout your vehicle. This part is in charge of different body functions, such as the keyless entry, mirror features, washers, and wipers. If something goes wrong and the BCM can’t receive or send information properly, it can trigger trouble codes, such as code U0140.

There are multiple networks on today’s vehicles and when one or more modules stop talking, a U series code is stored. That’s what this is about.

If you’re using a scan tool and a U0140 code pops up, here’s some info that’s helpful to know.

What Does the U0140 Code Mean?

U0140 is a generic diagnostic trouble code (DTC) that stands for “Lost Communication With Body Control Module.” This code generally means that the BCM isn’t properly transmitting or receiving signals.

Keep in mind that there are multiple networks on today’s vehicles and when one or more modules stop talking, a U series code is stored.

A U0140 code can have a wide variety of indications. It’s usually related to component failure or wiring problems with the BCM. However, this code may also be triggered by complications with the data network itself. The network serves as a communication line that connects the BCM to the vehicle’s other modules. If a short or electrical issue causes the network to become faulty, a code U0140 may show up on your scanner.

Note: The definition of code U0140 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Possible Causes of the U0140 Code?

Many problems can trigger a U0140 code, depending on your vehicle’s make and model. Here’s a list of this trouble code’s most common causes:

• Circuit problems, such as a damaged wire or poor connection
• BCM internal hardware failure or software in need of an update
• Data network problems
• Depleted battery

What are the Common Symptoms of the U0140 Code?

There are many symptoms that are linked to a U0140 code. These symptoms can also change, depending on what’s causing the trouble code.

• Illuminated warning lights
• Inoperative body-related functions, such as door locks and power windows
• Vehicle won’t start

How to Diagnose the U0140 Code

It can be difficult to diagnose a U0140 code. It takes a high level of technical skill, because this code can have a wide variety of potential causes, depending on the vehicle’s make and model. If you’re uncertain as It’s best to ask a professional to help you fix the problems that are triggering the U0140 code. You can also get a better understanding of how to diagnose a code U0140 by watching this video:

How to Fix the U0140 Code

There’s no magic fix for vehicle problems that trigger trouble codes. Mechanics require extensive training and years of experience to efficiently troubleshoot OBD codes, including U0140. Fixing your vehicle can be too complicated to do at home. Ask a mechanic for help to get your vehicle fixed and sort out trouble codes as soon as possible.

If you want to learn more about the U0140 code, you can try doing your own research to learn more about the problems causing it. Check for any underlying complications related to the trouble code. Gather all the information you need and refer to a reliable repair manual or online repair database to determine the next appropriate steps.

What solves the issues that trigger a U0140 in a Chevy may work for a Ford. Take your time and be careful. If troubleshooting becomes too technical for you, don’t think twice about consulting a mechanic.

Where to Get a New Body Control Module for Your Vehicle

Your vehicle’s damaged body control module will render several electrical functions useless, so why not get a durable replacement right away?

CarParts.com prides itself with fast shipping services, delivering the part you need straight to your doorstep in as fast as two business days. This means that your vehicle won’t have to stay cooped up in the garage for too long.

Enjoy a hassle-free shopping experience when you enter your vehicle’s year, make, and model into our vehicle selector. This will narrow down the catalog to compatible body control modules for your daily driver.

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