C1A02 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 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.
Code C1A02 Description
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.
What are the Possible Causes of the DTC C1A02?
- 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?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1A02 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 code?
Need more information on how to fix the C1A02 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C1A02 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- C1A02 Lexus — Vehicle Information Not Obtained
- C1A02 Toyota — Vehicle Information Not Obtained
Frequently Asked Questions about C1A02 Code
1. What does the OBDII code C1A02 mean?
The C1A02 code indicates that the vehicle's control module could not retrieve necessary vehicle information, such as identification details or configuration data.
2. What are the common symptoms of the C1A02 code?
Symptoms may include warning lights on the dashboard, loss of functionality in advanced driver assistance systems (ADAS), or issues with communication between modules.
3. What causes the C1A02 code to be triggered?
Common causes include a malfunctioning control module, corrupted or incomplete vehicle data, wiring or connector issues, or software glitches.
4. Can a dead or weak battery cause the C1A02 code?
Yes, a weak or failing battery can disrupt communication between modules, potentially triggering the C1A02 code.
5. How can a technician diagnose the C1A02 code?
Diagnosis typically involves scanning the vehicle with an advanced OBDII scanner, checking for related codes, inspecting wiring and connectors, and testing the functionality of relevant modules.
6. Can I continue driving with the C1A02 code active?
It depends on the severity of the issue. While the vehicle may still be drivable, certain safety or ADAS features might not function properly.
7. How is the C1A02 code commonly repaired?
Repairs may include reprogramming or resetting the control module, repairing or replacing damaged wiring, or updating software to ensure proper communication.
8. Is the C1A02 code specific to any vehicle make or model?
The C1A02 code is typically found in vehicles equipped with advanced diagnostic systems, but the exact meaning and troubleshooting steps may vary by manufacturer.
9. Can updating the vehicle’s software fix the C1A02 code?
Yes, a software update might resolve the issue if it is caused by a programming glitch or outdated module firmware.
10. How much does it cost to fix the C1A02 code?
The repair cost can vary widely, ranging from $100 to $500 or more, depending on whether the issue is software-related or requires module replacement.
Discuss the causes and fixes for C1A02 OBDII Code
Code C1A02 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
