U1A03
Telematics Control Unit SIM Card
U1A03 is an OBD-II diagnostic trouble code meaning: Telematics Control Unit SIM Card. Common causes: sim card missing or incorrectly installed, sim card damaged. Estimated repair cost: ~$167.
Symptoms
- Lack of connection to car Internet services
- Emergency call (eCall) does not work
- Error message on the instrument panel display
- No navigation map updates
- Remote services do not work through the mobile application
Causes
- SIM card missing or incorrectly installed
- SIM card damaged
- Connection problems at TCU connector
- Malfunction of the telematics control unit
- Damage to the wiring harness to the telematics unit
How to Fix
- Check the presence and correct installation of the SIM card
- Try rebooting the telematics system
- Check the connection of the TCU connectors
- Test the operation of the SIM card in another device
- Repair only from an authorized dealer
Related codes
FAQ
What does the U1A03 code mean?
U1A03 is an OBD-II diagnostic trouble code that indicates: Telematics Control Unit SIM Card
What causes a U1A03 error code?
The most common causes of U1A03 include: SIM card missing or incorrectly installed; SIM card damaged; Connection problems at TCU connector; Malfunction of the telematics control unit.
How do I fix a U1A03 diagnostic trouble code?
To fix U1A03: Check the presence and correct installation of the SIM card. Try rebooting the telematics system. Check the connection of the TCU connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1A03?
Yes, but get it checked soon
How much does it cost to fix U1A03?
The estimated repair cost for U1A03 is ~$167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat