AutoCodes – Toyota – C1A02 Toyota

C1A02 Toyota Code - Vehicle Information Not Obtained

Quick Answer

For vehicles with Dynamic Radar Cruise Control System: When a new Driving Support ECU Assembly is installed, it receives vehicle specification information (destination, steering wheel position, 2WD or AWD information, etc.) from the Main Body ECU (Multiplex Network Body ECU) and stores the information. Common causes include Faulty Driving Support ECU Assembly, Driving Support ECU Assembly harness is open or shorted, Driving Support ECU 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: C1A02 Toyota indicates Vehicle Information Not Obtained.
Common causes: Common causes include Faulty Driving Support ECU Assembly, Driving Support ECU Assembly harness is open or shorted, Driving Support ECU 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 445

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 Feb 28, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code C1A02 Toyota Description

For vehicles with Dynamic Radar Cruise Control System: When a new Driving Support ECU Assembly is installed, it receives vehicle specification information (destination, steering wheel position, 2WD or AWD information, etc.) from the Main Body ECU (Multiplex Network Body ECU) and stores the information. Diagnostic Trouble Code (DTC) C1A02 is stored when the Driving Support ECU Assembly receives the vehicle specification information from the Main Body ECU (Multiplex Network Body ECU) but cannot store it.

For vehicles with Pre-collision System: When a new Driving Support ECU Assembly is installed, it receives vehicle specification information from the Main Body ECU (Multiplex Network Body ECU) and memorizes the information. DTC C1A02 is stored when the Driving Support ECU Assembly receives the vehicle specification information from the Main Body ECU (Multiplex Network Body ECU) but cannot record it.

OBDII Code C1A02 Toyota - Vehicle Information Not Obtained - AutoCodes.com — C1A02 Toyota Code - Vehicle Information Not Obtained

What does this mean?

What are the Possible Causes of the DTC C1A02 Toyota?

Faulty Driving Support ECU Assembly
Driving Support ECU Assembly harness is open or shorted
Driving Support ECU Assembly circuit poor electrical connection

How to Fix the DTC C1A02 Toyota?

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 does this mean?

Code Tech Notes

When replacing the Driving Support ECU Assembly, always replace it with a new one. If a Driving Support ECU Assembly which was installed in another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1A02 Toyota 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 C1A02 Toyota code?

Need more information on how to fix the C1A02 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1A02 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

C1A02 2013 Toyota RAV4 — Vehicle Information Not Obtained
C1A02 2014 Toyota RAV4 — Vehicle Information Not Obtained
C1A02 2015 Toyota RAV4 — Vehicle Information Not Obtained
C1A02 2016 Toyota RAV4 — Vehicle Information Not Obtained
C1A02 2017 Toyota RAV4 — Vehicle Information Not Obtained
C1A02 2018 Toyota RAV4 — Vehicle Information Not Obtained

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.