AutoCodes – Lexus – C1AAA Lexus

C1AAA Lexus Code - FCM Destination Information Uninitialized

Quick Answer

For vehicles with Lane Departure Alert System: When the Lane Departure Warning Camera is replaced with a new one, it acquires the country specification information from the Main Body ECU (Multiplex Network Body ECU). Common causes include Faulty Main Body ECU (Multiplex Network Body ECU), Faulty Lane Departure Warning Camera (For vehicles with Lane Departure Alert System), Faulty Forward Recognition Camera. 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: C1AAA Lexus indicates FCM Destination Information Uninitialized.
Common causes: Common causes include Faulty Main Body ECU (Multiplex Network Body ECU), Faulty Lane Departure Warning Camera (For vehicles with Lane Departure Alert System), Faulty Forward Recognition Camera.
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 269

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 11, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code C1AAA Lexus Description

For vehicles with Lane Departure Alert System: When the Lane Departure Warning Camera is replaced with a new one, it acquires the country specification information from the Main Body ECU (Multiplex Network Body ECU). If the Lane Departure Warning Camera cannot store the country specification information, DTC C1AAA is stored.

For vehicles with Forward Recognition Camera System: When the Forward Recognition Camera is replaced with a new one, it stores the country specification information received from the Main Body ECU (Multiplex Network Body ECU). If the Forward Recognition Camera cannot store the country specification information, DTC C1AAA is stored.

For vehicles with Lane Departure Alert System (W/ Steering Control): When the Forward Recognition Camera is replaced with a new one, the new Forward Recognition Camera attempts to store the country specification information received from the Main Body ECU (Multiplex Network Body ECU). If the Forward Recognition Camera cannot store the country specification information, DTC C1AAA is stored.

OBDII Code C1AAA Lexus - FCM Destination Information Uninitialized - AutoCodes.com — C1AAA Lexus Code - FCM Destination Information Uninitialized

What does this mean?

What are the Possible Causes of the DTC C1AAA Lexus?

Faulty Main Body ECU (Multiplex Network Body ECU)
Faulty Lane Departure Warning Camera (For vehicles with Lane Departure Alert System)
Faulty Forward Recognition Camera

How to Fix the DTC C1AAA 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 C1AAA 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.

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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.