Engine-Codes.com
Engine-Codes – Lexus – C142B Lexus

C142B Lexus Code - Motor Power Supply Voltage Circuit

Quick Answer

The C142B diagnostic trouble code for Lexus vehicles refers to the Motor Power Supply Voltage Circuit. Common causes include Faulty motor power supply voltage regulator, Loose or corroded electrical connections, Damaged wiring harness. 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 Lexus indicates Motor Power Supply Voltage Circuit.
Common causes
Common causes include Faulty motor power supply voltage regulator, Loose or corroded electrical connections, Damaged wiring harness.
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 15, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code C142B Lexus Description

The C142B diagnostic trouble code for Lexus vehicles refers to the Motor Power Supply Voltage Circuit. This code indicates that there is an issue with the voltage supply to the motor in the vehicle, which can have a significant impact on its performance. The motor power supply voltage circuit is responsible for providing the necessary power to the motor to ensure proper operation. When this circuit malfunctions, it can lead to various issues that affect the vehicle's overall performance.

OBDII Code C142B Lexus - Motor Power Supply Voltage Circuit
C142B Lexus Code - Motor Power Supply Voltage Circuit

Common Causes of C142B Lexus

  1. Faulty motor power supply voltage regulator
  2. Loose or corroded electrical connections
  3. Damaged wiring harness
  4. Defective motor
  5. Issues with the vehicle's battery or alternator

Symptoms of C142B Lexus

  1. Loss of power steering assistance
  2. Erratic behavior of the air conditioning system
  3. Electrical malfunctions such as flickering lights or failure to start
  4. Reduced fuel efficiency
  5. Unusual noises coming from the motor or related components

How to Fix C142B Lexus

  1. Begin by conducting a thorough inspection of the motor power supply voltage circuit, checking for loose connections, damaged wiring, and any visible signs of wear or corrosion.
  2. Test the motor power supply voltage regulator to determine if it is functioning correctly. Replace the regulator if necessary.
  3. Check the motor for any signs of damage or malfunction. Replace the motor if it is found to be defective.
  4. Test the vehicle's battery and alternator to ensure they are providing the correct voltage to the motor. Replace any faulty components as needed.
  5. Clear the diagnostic trouble codes from the vehicle's system and perform a test drive to ensure that the issue has been resolved.

Cost to Fix C142B Lexus

The typical repair costs for addressing the C142B code related to the Motor Power Supply Voltage Circuit can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the cost of parts for this repair can range from $100 to $500, while the labor costs can range from $150 to $300. However, it's important to note that these are rough estimates, and the actual costs can vary based on factors such as the location of the repair shop, the vehicle's make and model, and the type of engine. Additionally, diagnostic time and labor rates at auto repair shops can vary, with rates typically ranging between $80 and $150 per hour. It is recommended to obtain quotes from local repair shops to get a more accurate estimate for this repair.

Need more information about the C142B Lexus code?

Need more information on how to fix the C142B Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C142B Lexus code diagnosed by a professional: Find a repair shop in your area

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 Lexus Code

1. What does the OBDII code C142B mean on a Lexus?

C142B indicates an issue with the motor power supply voltage circuit, which affects the power supply to components like the ABS motor.

2. What are the common symptoms of code C142B in a Lexus?

Symptoms may include the ABS or traction control warning light turning on, reduced braking performance, or a failure of the ABS system to function properly.

3. What causes the C142B code to appear in a Lexus?

Common causes include a faulty ABS motor relay, damaged wiring or connectors in the motor power supply circuit, or a failing ABS motor assembly.

4. Can I still drive my Lexus with a C142B code?

While the vehicle may still be drivable, the ABS system may not function correctly, increasing the risk of wheel lockup during hard braking. It’s best to address the issue promptly.

5. How do I diagnose the C142B code in my Lexus?

Diagnosis involves using a scan tool to confirm the code, inspecting the ABS motor relay, checking the wiring and connectors for damage, and testing the motor power supply voltage.

6. How can I fix the C142B code on my Lexus?

Repairs may include replacing a faulty ABS motor relay, repairing or replacing damaged wiring or connectors, or replacing the ABS motor assembly if it’s defective.

7. How much does it cost to fix the C142B code in a Lexus?

Repair costs vary depending on the issue. Replacing an ABS motor relay typically costs $50–$150, while replacing the ABS motor assembly can range from $500 to $1,200.

8. Can a low battery cause the C142B code in a Lexus?

Yes, a weak or failing battery can lead to insufficient power supply to the ABS motor, potentially triggering the C142B code.

9. How do I prevent the C142B code from occurring in my Lexus?

Regularly inspect and maintain the ABS system, ensure the battery is in good condition, and address any electrical issues promptly to prevent voltage-related errors.

10. Do I need a professional mechanic to fix the C142B code on my Lexus?

While experienced DIYers can handle minor repairs like replacing a relay, diagnosing and fixing wiring issues or ABS motor problems often requires professional expertise.

Discuss the causes and fixes for C142B Lexus OBDII Code

Submit a New Comment

Code C142B Lexus comments

No comments found for this page.