AutoCodes – Toyota – U0142 2016 Toyota RAV4

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

Quick Answer

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Body Control Module 'B', Body Control Module 'B' 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: U0142 2016 Toyota RAV4 indicates Lost Communication with Body Control Module 'B'.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Body Control Module 'B', Body Control Module 'B' 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.

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Code Popularity 250

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 27, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0142 2016 Toyota RAV4 Description

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. The exchange of operating information and commands among devices is facilitated by pre-programmed information about the required message exchange on the serial data circuits. Communication is carried out using two dedicated wires, known as CAN high and CAN low, with both lines carrying 2.5V when the CAN bus is in idle mode. During the transmission of data bits, the CAN high line increases to 3.75V while the CAN low drops to 1.25V, creating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Body Control Module 'B' has not been received.

OBDII Code U0142 2016 Toyota RAV4 - Lost Communication with Body Control Module 'B' - AutoCodes.com — U0142 2016 Toyota RAV4 Code - Lost Communication with Body Control Module 'B'

What does this mean?

What are the Possible Causes of the DTC U0142 2016 Toyota RAV4?

Faulty Controller Area Network (CAN) Communication System
Faulty Body Control Module 'B'
Body Control Module 'B' harness is open or shorted
Body Control Module 'B' circuit poor electrical connection

How to Fix the DTC U0142 2016 Toyota RAV4?

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 does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0142 2016 Toyota RAV4 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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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.