U103C
Keyless Ignition Node Communication
U103C is an OBD-II diagnostic trouble code meaning: Keyless Ignition Node Communication. Common causes: malfunction of the keyless start unit, damage to the wiring harness to the assembly. Estimated repair cost: $56–167.
Symptoms
- The car does not respond to the key fob
- Can't start engine with button
- The immobilizer indicator is flashing
- Error message on the dashboard
- Intermittent operation of the keyless system
Causes
- Malfunction of the keyless start unit
- Damage to the wiring harness to the assembly
- Node power problems
- Interference on the CAN bus
- Keyless system antenna malfunction
How to Fix
- Check fuses associated with the system
- Diagnose the condition of the wiring harness
- Check the power supply to the keyless start unit
- Scan the CAN bus for errors
- Test or replace the keyless start assembly
Related codes
FAQ
What does the U103C code mean?
U103C is an OBD-II diagnostic trouble code that indicates: Keyless Ignition Node Communication
What causes a U103C error code?
The most common causes of U103C include: Malfunction of the keyless start unit; Damage to the wiring harness to the assembly; Node power problems; Interference on the CAN bus.
How do I fix a U103C diagnostic trouble code?
To fix U103C: Check fuses associated with the system. Diagnose the condition of the wiring harness. Check the power supply to the keyless start unit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U103C?
Yes, but get it checked soon
How much does it cost to fix U103C?
The estimated repair cost for U103C is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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