AutoCodes – Lexus – C142A Lexus

C142A Lexus Code - Master Cylinder Pressure Sensor Internal Malfunction

Quick Answer

The Master Cylinder Pressure Sensor is connected to the Skid Control ECU (Brake Actuator Assembly). Common causes include Faulty Brake Actuator Assembly (Master Cylinder Pressure Sensor), Brake Actuator Assembly harness is open or shorted, Brake Actuator Assembly 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: C142A Lexus indicates Master Cylinder Pressure Sensor Internal Malfunction.
Common causes: Common causes include Faulty Brake Actuator Assembly (Master Cylinder Pressure Sensor), Brake Actuator Assembly harness is open or shorted, Brake Actuator Assembly 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 552

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 Jan 29, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code C142A Lexus Description

The Master Cylinder Pressure Sensor is connected to the Skid Control ECU (Brake Actuator Assembly). The Skid Control ECU monitors the Master Cylinder Pressure Sensor. The Skid Control ECU sets the Diagnostic Trouble Code (DTC) when the Master Cylinder Pressure Sensor is not to factory specifications.

OBDII Code C142A Lexus - Master Cylinder Pressure Sensor Internal Malfunction - AutoCodes.com — C142A Lexus Code - Master Cylinder Pressure Sensor Internal Malfunction

What does this mean?

What are the Possible Causes of the DTC C142A Lexus?

Faulty Brake Actuator Assembly (Master Cylinder Pressure Sensor)
Brake Actuator Assembly harness is open or shorted
Brake Actuator Assembly circuit poor electrical connection

How to Fix the DTC C142A Lexus?

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 C142A Lexus 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.

Need more information about the C142A Lexus code?

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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.