B0460Bluetooth Antenna Circuit
- Generic OBD-II code · Body
- How the car detects it
- B0460 appears in none of the accessible J2012 lists and in no manufacturer document, so it remains unproven. Its title concerns the Bluetooth antenna circuit. GM's Global A system in the Saab 9-5 and 9-4X (2011) covers the same part under its own number B2485: the small antenna sits directly on the OnStar module without a cable, is tested once a second, and an open or grounded antenna disables Bluetooth and turns the status LED red. Visteon's US20040116084A1 sends DC down an antenna feed and judges open or short from the current drawn, while Delphi's US6999858B2 detects a removed antenna by a floating DC node or by a mismatch at the transmitter output. Poor range or lost pairing points here; a dead Bluetooth chip belongs to B0440.
- What you may notice
- Phone pairs only at very short distance or not at all
- Bluetooth switched off by the module, status lamp red
- Calls and streaming break up repeatedly
- Likely causes
- LikelyAntenna contact or plug at the module loose or corroded
- PossibleAntenna or its lead damaged, e.g. after work behind the dash
- RareAntenna detection or radio stage inside the module faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.