U0140 Infiniti Code - Lost Communication With Body Control Module
Quick Answer
The Controller Area Network (CAN) is a serial communication line for real time applications. Common causes include CAN communication line between Body Control Module (BCM) and Engine Control Module (ECM), Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U0140 Infiniti indicates Lost Communication With Body Control Module.
- Common causes
- Common causes include CAN communication line between Body Control Module (BCM) and Engine Control Module (ECM), Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code U0140 Infiniti Description
Pictures shown may vary from actual
What are the Possible Causes of the DTC U0140 Infiniti?
- CAN communication line between Body Control Module (BCM) and Engine Control Module (ECM)
- Faulty Body Control Module (BCM)
- Body Control Module (BCM) harness is open or shorted
- Body Control Module (BCM) circuit poor electrical connection
How to Fix the DTC U0140 Infiniti?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U0140 Infiniti code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about U0140 Infiniti Code
1. What are common symptoms of the OBDII code U0140 in an Infiniti related to communication loss with the Body Control Module?
- Common symptoms include malfunctioning interior lights, power window issues, door lock problems, and non-functional climate control features.
2. What causes the U0140 code in an Infiniti, indicating a communication breakdown with the Body Control Module?
- The U0140 code is typically triggered by faulty wiring, loose connections, a malfunctioning Body Control Module, or a problem with the communication network.
3. How can I diagnose the U0140 code in my Infiniti to identify the root cause of the communication loss with the Body Control Module?
- Diagnose the U0140 code by checking the wiring harness for damage, inspecting connectors for corrosion, testing the Body Control Module for functionality, and scanning other control modules for related issues.
4. Are there any simple repair tips for fixing the U0140 code in an Infiniti with a communication error involving the Body Control Module?
- Simple repair tips include checking and securing all wiring connections, cleaning corroded connectors, resetting the Body Control Module, and performing a software update if available.
5. Can a DIY enthusiast fix the U0140 code on their Infiniti caused by a lost communication with the Body Control Module?
- While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing the U0140 code may require specialized tools and expertise, making it advisable to consult a professional mechanic.
6. Is it safe to continue driving my Infiniti with the U0140 code present, indicating a communication issue with the Body Control Module?
- It is not recommended to drive your Infiniti with the U0140 code unresolved, as it can lead to further electrical problems and potential safety hazards due to the loss of communication with critical vehicle systems.
7. How much does it typically cost to repair the U0140 code in an Infiniti when the issue involves a communication breakdown with the Body Control Module?
- Repair costs for the U0140 code can vary depending on the exact cause of the communication loss, but they may range from $200 to $800, including parts and labor.
8. Can extreme weather conditions or water damage contribute to triggering the U0140 code in an Infiniti related to communication issues with the Body Control Module?
- Yes, extreme weather conditions, water exposure, or moisture intrusion can damage wiring connections or control modules, leading to communication failures and the triggering of the U0140 code.
9. Are there any common Infiniti models known to experience the U0140 code frequently due to communication problems with the Body Control Module?
- Infiniti models such as the G35, FX35, QX56, and M35 have been reported to encounter the U0140 code, highlighting the importance of proper maintenance and timely repairs.
10. How long does it typically take a mechanic to diagnose and repair the U0140 code in an Infiniti caused by a loss of communication with the Body Control Module?
- The diagnosis and repair of the U0140 code can take anywhere from a few hours to a full day, depending on the complexity of the issue, availability of parts, and the mechanic's experience.
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