OBD Guide
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U103A

CAN Audio And Telematics Bus Electrical Diagnostic

U103A is an OBD-II diagnostic trouble code meaning: CAN Audio And Telematics Bus Electrical Diagnostic. Common causes: broken can bus wires, short circuit in the circuit. Estimated repair cost: $17–111.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–111 (est.)

Symptoms

  • Audio system doesn't work
  • Lost connection to navigation
  • Multimedia system glitches
  • Check Engine light comes on
  • Voice control issues

Causes

  • Broken CAN bus wires
  • Short circuit in the circuit
  • Oxidation of contacts in connectors
  • Audio module malfunction
  • Problems with the telematics unit

How to Fix

  1. Check the integrity of the CAN bus wires
  2. Inspect and clean the connector contacts
  3. Check power and ground of modules
  4. Scan all related modules for errors
  5. Replace the faulty component if necessary

Related codes

U1000U1010U1040

FAQ

What does the U103A code mean?

U103A is an OBD-II diagnostic trouble code that indicates: CAN Audio And Telematics Bus Electrical Diagnostic

What causes a U103A error code?

The most common causes of U103A include: Broken CAN bus wires; Short circuit in the circuit; Oxidation of contacts in connectors; Audio module malfunction.

How do I fix a U103A diagnostic trouble code?

To fix U103A: Check the integrity of the CAN bus wires. Inspect and clean the connector contacts. Check power and ground of modules. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U103A?

Yes, but get it checked soon

How much does it cost to fix U103A?

The estimated repair cost for U103A is $17–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat