OBD Guide
ENFRDEESPT

U1A02

Telematics Control Unit Communication Module

U1A02 is an OBD-II diagnostic trouble code meaning: Telematics Control Unit Communication Module. Common causes: telematics module power supply problems, open or short circuit in wiring harness. Estimated repair cost: $56–278.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Lack of connection with remote services
  • Problems with the navigation system
  • Emergency call not working
  • Malfunctions of the multimedia system
  • Check Engine Light Illuminates

Causes

  • Telematics module power supply problems
  • Open or short circuit in wiring harness
  • Module software failures
  • Damage to the telematics module itself
  • Problems with the GPS/GSM antenna

How to Fix

  1. Check fuses and module power supply
  2. Inspect the wiring harness for damage
  3. Carry out diagnostics of the telematics module
  4. Update module software
  5. If necessary, replace the telematics module

Related codes

U1A00U1A01U1A03

FAQ

What does the U1A02 code mean?

U1A02 is an OBD-II diagnostic trouble code that indicates: Telematics Control Unit Communication Module

What causes a U1A02 error code?

The most common causes of U1A02 include: Telematics module power supply problems; Open or short circuit in wiring harness; Module software failures; Damage to the telematics module itself.

How do I fix a U1A02 diagnostic trouble code?

To fix U1A02: Check fuses and module power supply. Inspect the wiring harness for damage. Carry out diagnostics of the telematics module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1A02?

Yes, but get it checked soon

How much does it cost to fix U1A02?

The estimated repair cost for U1A02 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat