OBD Guide
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C1A73

Driving Support ECU Receive Data Malfunction

C1A73 is an OBD-II diagnostic trouble code meaning: Driving Support ECU Receive Data Malfunction. Common causes: broken or damaged wiring harness, driving support module malfunction. Estimated repair cost: $56–222.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Disabling driving assistance systems
  • Check Engine Light Illuminated
  • Alerts appearing on the dashboard

Causes

  • Broken or damaged wiring harness
  • Driving support module malfunction
  • Problems with the CAN bus
  • Software failures in the ECU

How to Fix

  1. Check wiring harness for damage
  2. Check driving support module connections
  3. Scan the system for additional errors
  4. Update ECU software
  5. If necessary, replace the driving support module

Related codes

U0121U0122C1A74

FAQ

What does the C1A73 code mean?

C1A73 is an OBD-II diagnostic trouble code that indicates: Driving Support ECU Receive Data Malfunction

What causes a C1A73 error code?

The most common causes of C1A73 include: Broken or damaged wiring harness; Driving support module malfunction; Problems with the CAN bus; Software failures in the ECU.

How do I fix a C1A73 diagnostic trouble code?

To fix C1A73: Check wiring harness for damage. Check driving support module connections. Scan the system for additional errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1A73?

Limited driving only, diagnose soon

How much does it cost to fix C1A73?

The estimated repair cost for C1A73 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat