AutoCodes – Lexus – C1A64 Lexus

C1A64 Lexus Code - Brake Control Signal Mismatch

Quick Answer

The Skid Control ECU (Brake Actuator Assembly) sends signals to the Driving Support ECU Assembly according to the brake control status. Common causes include Faulty Vehicle Stability Control System, Faulty Brake Actuator Assembly (Skid Control ECU), Faulty Driving Support ECU Assembly. 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: C1A64 Lexus indicates Brake Control Signal Mismatch.
Common causes: Common causes include Faulty Vehicle Stability Control System, Faulty Brake Actuator Assembly (Skid Control ECU), Faulty Driving Support ECU Assembly.
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 273

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 03, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code C1A64 Lexus Description

The Skid Control ECU (Brake Actuator Assembly) sends signals to the Driving Support ECU Assembly according to the brake control status. If the Driving Support ECU Assembly receives a Vehicle Stability Control (VSC) System malfunction signal from the Skid Control ECU (Brake Actuator Assembly), it stores Diagnostic Trouble Code (DTC) C1A64.

OBDII Code C1A64 Lexus - Brake Control Signal Mismatch - AutoCodes.com — C1A64 Lexus Code - Brake Control Signal Mismatch

What does this mean?

What are the Possible Causes of the DTC C1A64 Lexus?

Faulty Vehicle Stability Control System
Faulty Brake Actuator Assembly (Skid Control ECU)
Faulty Driving Support ECU Assembly

How to Fix the DTC C1A64 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 C1A64 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 C1A64 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.