OBD-II FAULT CODE
B2123
Passenger Side Satellite Communication Circuit Short to Ground
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for B2123.
- Body/accessory warning lamp or feature not working
- Low battery voltage
- Blown module fuse
- Poor ground
- Open/short on communication bus
- Module offline
- Check related fuses, connectors, grounds and switch/module power supply
- Run a full system scan to identify modules not responding
- Inspect CAN/SCP wiring, connectors and grounds
- Inspect harness for rubbing/pinch points and check resistance to ground
- Repair power/ground or network wiring fault first
- Only consider module replacement after wiring and power supply checks pass
- Repair insulation/harness damage or replace internally shorted component
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.