Body, generic

B0460 Bluetooth Antenna Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Antenna contact or plug at the module loose or corroded
Antenna or its lead damaged, e.g. after work behind the dash
Antenna detection or radio stage inside the module faulty

Symptoms

  • 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

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–600
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

bluetooth antennainfotainment moduletelematics module

Related codes

B0440U0198

References: saabwisonline.com, patents.google.com, patents.google.com.