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U0142 2016 Toyota RAV4 Code - Lost Communication with Body Control Module 'B'

Quick Answer

The U0142 code for a 2016 Toyota RAV4 indicates a communication problem between the vehicle's onboard computer system and the Body Control Module 'B'. Common causes include Wiring issues or damaged connectors, Faulty Body Control Module 'B', Problems with the vehicle's onboard computer system. 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
U0142 2016 Toyota RAV4 indicates Lost Communication with Body Control Module 'B'.
Common causes
Common causes include Wiring issues or damaged connectors, Faulty Body Control Module 'B', Problems with the vehicle's onboard computer system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code U0142 2016 Toyota RAV4 Description

The U0142 code for a 2016 Toyota RAV4 indicates a communication problem between the vehicle's onboard computer system and the Body Control Module 'B'. The Body Control Module 'B' is responsible for controlling various electrical functions in the vehicle, such as interior lighting, power windows, door locks, and other accessories. When communication is lost with this module, it can lead to malfunctions in these systems, affecting the overall performance and functionality of the vehicle.

OBDII Code U0142 2016 Toyota RAV4 - Lost Communication with Body Control Module 'B'
U0142 2016 Toyota RAV4 Code - Lost Communication with Body Control Module 'B'

Common Causes of U0142 2016 Toyota RAV4

  1. Wiring issues or damaged connectors
  2. Faulty Body Control Module 'B'
  3. Problems with the vehicle's onboard computer system
  4. Corrosion or moisture affecting electrical connections
  5. Electrical interference or signal disruption

Symptoms of U0142 2016 Toyota RAV4

  1. Check Engine Light illuminated on the dashboard
  2. Non-functional power windows
  3. Interior lights not working
  4. Door locks malfunctioning
  5. Intermittent electrical issues

How to Fix U0142 2016 Toyota RAV4

  1. Perform a thorough inspection of the wiring and connectors related to the Body Control Module 'B'.
  2. Test the communication between the onboard computer system and the Body Control Module 'B' using diagnostic tools.
  3. Replace any damaged wiring or connectors, and ensure proper connections are made.
  4. If the Body Control Module 'B' is found to be faulty, replace it with a new unit and program it to communicate with the vehicle's systems.
  5. Clear the diagnostic trouble codes from the vehicle's computer system and perform a final test to verify that communication has been restored.

Cost to Fix U0142 2016 Toyota RAV4

The typical repair costs for addressing a U0142 code on a 2016 Toyota RAV4 can vary depending on the specific cause of the communication failure and the parts and labor required for the repair. In general, the cost of replacing a faulty Body Control Module 'B' and related wiring or connectors can range from $300 to $800, including parts and labor. Additional diagnostic time and labor rates may apply, with typical hourly rates ranging from $80 to $150. It's recommended to consult with a qualified mechanic or auto repair shop to obtain a more precise estimate based on the specific circumstances of the vehicle and the location of the repair facility.

What does this mean?

Tech Notes for U0142 2016 Toyota RAV4

When there are problems with the way different systems in a vehicle communicate with each other using a technology called Controller Area Network (CAN) communication, Diagnostic Trouble Codes (DTC) are displayed. These codes can be caused by issues with the main bus or branch of the communication network, or with the Electronic Control Units (ECUs) and sensors that make up the different systems. If you see code for both the CAN communication problems and internal or power source problems at the same time, you should focus on fixing the internal or power source problems first.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U0142 2016 Toyota RAV4 Code

1. What are the common symptoms of OBDII code U0142 in a 2016 Toyota RAV4?

- Common symptoms include issues with power windows, door locks, interior lights, and other body control functions.

2. What does the OBDII code U0142 mean for a 2016 Toyota RAV4?

- The code indicates a communication problem between the vehicle's engine control module (ECM) and the body control module 'B'.

3. What are the possible causes of the U0142 code in a 2016 Toyota RAV4?

- The code can be triggered by wiring or connection issues, a faulty body control module, a malfunctioning ECM, or software glitches.

4. How can I diagnose the U0142 code in my 2016 Toyota RAV4?

- Diagnosing the code involves checking the wiring and connections between the ECM and body control module, testing for voltage, and using a diagnostic scanner.

5. Can I still drive my 2016 Toyota RAV4 with the U0142 code?

- It is not recommended to drive the vehicle with the U0142 code as it may lead to further electrical issues and potential safety hazards.

6. How can I repair the U0142 code in my 2016 Toyota RAV4?

- Repairing the code typically involves addressing the root cause, such as fixing wiring issues, replacing the body control module, or reprogramming the ECM.

7. Can resetting the ECM clear the U0142 code in a 2016 Toyota RAV4?

- Resetting the ECM may temporarily clear the code, but it is important to diagnose and fix the underlying issue to prevent the code from reoccurring.

8. Is it possible to fix the U0142 code in a 2016 Toyota RAV4 without professional help?

- While some basic checks like inspecting connections can be done by DIYers, diagnosing and repairing the U0142 code often requires professional expertise and specialized tools.

9. Are there any recalls or technical service bulletins related to the U0142 code in 2016 Toyota RAV4 models?

- It's advisable to check with Toyota dealerships or visit the official Toyota website to stay informed about any recalls or technical service bulletins related to the U0142 code.

10. How can I prevent the U0142 code from appearing in my 2016 Toyota RAV4?

- Regular maintenance, checking for loose connections, and addressing any electrical issues promptly can help prevent the U0142 code from appearing in your Toyota RAV4.

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