AutoCodes – Toyota – C142B 2018 Toyota RAV4

C142B 2018 Toyota RAV4 Code - Motor Power Supply Voltage Circuit

Quick Answer

The Motor Relay and motor fail-safe relay are built into the Brake Actuator Assembly. Common causes include Faulty Skid Control ECU (Brake Actuator Assembly), Skid Control ECU harness is open or shorted, Skid Control ECU circuit poor electrical connection. 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: C142B 2018 Toyota RAV4 indicates Motor Power Supply Voltage Circuit.
Common causes: Common causes include Faulty Skid Control ECU (Brake Actuator Assembly), Skid Control ECU harness is open or shorted, Skid Control ECU circuit poor electrical connection.
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 664

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 Sep 30, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C142B 2018 Toyota RAV4 Description

The Motor Relay and motor fail-safe relay are built into the Brake Actuator Assembly. During ABS, TRAC, VSC, brake hold, or brake assist operation, the Skid Control ECU (Brake Actuator Assembly) turns on the motor relay to run the pump motor in the Brake Actuator Assembly. When a motor system Diagnostic Trouble Code (DTC) is stored, the motor fail-safe relay cuts the power source supply to the motor relay for fail-safe operation.
This DTC may be stored when the voltage to the motor relay power source is lower than the DTC detection condition due to low output from the battery or alternator.

OBDII Code C142B 2018 Toyota RAV4 - Motor Power Supply Voltage Circuit - AutoCodes.com — C142B 2018 Toyota RAV4 Code - Motor Power Supply Voltage Circuit

What does this mean?

What are the Possible Causes of the DTC C142B 2018 Toyota RAV4?

Faulty Skid Control ECU (Brake Actuator Assembly)
Skid Control ECU harness is open or shorted
Skid Control ECU circuit poor electrical connection

How to Fix the DTC C142B 2018 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C142B 2018 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 C142B 2018 Toyota RAV4 Code

1. What are common symptoms of OBDII code C142B in a 2018 Toyota RAV4?

- Common symptoms include engine misfires, rough idling, poor acceleration, and potential stalling issues.

2. What does the OBDII code C142B in a 2018 Toyota RAV4 indicate?

- The code C142B indicates a fault in the motor power supply voltage circuit of the vehicle.

3. What are possible causes of OBDII code C142B in a 2018 Toyota RAV4?

- Possible causes include faulty wiring or connectors, a malfunctioning motor power supply, or issues with the vehicle's electronic control module.

4. How can I diagnose the OBDII code C142B in my 2018 Toyota RAV4?

- Diagnosing the code typically involves checking the wiring and connectors for damage, testing the motor power supply, and using a diagnostic tool to evaluate the electronic control module.

5. Can I drive my 2018 Toyota RAV4 with OBDII code C142B?

- It is not recommended to drive the vehicle with this code as it can lead to further damage and potential safety hazards. It is advisable to address the issue promptly.

6. How can I repair OBDII code C142B in my 2018 Toyota RAV4?

- Repairing the code may involve repairing or replacing damaged wiring, connectors, or components related to the motor power supply voltage circuit.

7. Can a DIY enthusiast fix OBDII code C142B in a 2018 Toyota RAV4?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing the underlying cause of the code may require professional expertise and specialized tools.

8. Is OBDII code C142B in a 2018 Toyota RAV4 an expensive repair?

- The cost of repair for this code can vary depending on the specific cause of the issue. Simple fixes like replacing a damaged wire may be relatively inexpensive, while issues with the electronic control module can be more costly.

9. Can OBDII code C142B in a 2018 Toyota RAV4 affect fuel efficiency?

- Yes, the code can affect fuel efficiency as it can lead to engine performance issues such as misfires and poor acceleration, resulting in increased fuel consumption.

10. How often does OBDII code C142B occur in a 2018 Toyota RAV4?

- The occurrence of this code can vary, but it is not a common issue in a well-maintained 2018 Toyota RAV4. If the code appears, it should be addressed promptly to prevent further problems.