OBD Guide
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C1A0A

Front Radar Sensor Region Code Mismatch

C1A0A is an OBD-II diagnostic trouble code meaning: Front Radar Sensor Region Code Mismatch. Common causes: sensor region code mismatch, front radar sensor malfunction. Estimated repair cost: $111–333.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$111–333 (est.)

Symptoms

  • Disabling active safety systems
  • Dashboard warning
  • Reduced functionality of adaptive cruise control

Causes

  • Sensor region code mismatch
  • Front radar sensor malfunction
  • Wiring Harness Problems
  • Software failure

How to Fix

  1. Check the sensor regional code using diagnostic equipment
  2. Update or reflash sensor software
  3. Check the integrity of the wiring harness
  4. Replace sensor if necessary

Related codes

C1A01C1A02U0121

FAQ

What does the C1A0A code mean?

C1A0A is an OBD-II diagnostic trouble code that indicates: Front Radar Sensor Region Code Mismatch

What causes a C1A0A error code?

The most common causes of C1A0A include: Sensor region code mismatch; Front radar sensor malfunction; Wiring Harness Problems; Software failure.

How do I fix a C1A0A diagnostic trouble code?

To fix C1A0A: Check the sensor regional code using diagnostic equipment. Update or reflash sensor software. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1A0A?

Do not drive — repair immediately

How much does it cost to fix C1A0A?

The estimated repair cost for C1A0A is $111–333. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat