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DTC codes / B04xx · Airbags, seats, doors, lights and comfort systems / B0460

B0460Bluetooth Antenna Circuit

B0460 indicates that the body control module (BCM) has detected an open or short circuit in the Bluetooth antenna circuit, which is used for hands-free phone communication. The module monitors the antenna's electrical continuity and sets this code when the signal is outside the expected range, often disabling Bluetooth functionality.

SystemBody
Code typeGeneric (all makes)
SeverityLow
Fix difficultyIntermediate
AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

  • Bluetooth hands-free system does not connect or pair with phones
  • Warning light or message on the dashboard indicating a communication fault
  • Often no symptoms besides the warning light, with Bluetooth still partially working
  • Intermittent Bluetooth audio dropouts or reduced range
  • Voice command or phonebook sync features become unavailable
  • Radio or infotainment screen may show a 'Bluetooth module not found' error

Common causes, most likely first

  1. Damaged or disconnected Bluetooth antenna coaxial cable
  2. Corroded or loose antenna connector at the Bluetooth module or antenna
  3. Faulty Bluetooth antenna itself (internal open or short)
  4. Water intrusion or physical damage to the antenna mounting area
  5. Failed Bluetooth communication module (internal circuit fault)
  6. Open or short in the wiring harness between the module and antenna
  7. Poor ground connection for the Bluetooth module

How to diagnose and fix it

  1. Use a scan tool to confirm B0460 is current and check for related communication codes in the BCM and infotainment systems
  2. Inspect the Bluetooth antenna and its coaxial cable for visible damage, corrosion, or loose connections
  3. Disconnect the antenna connector and measure resistance across the antenna element; compare to manufacturer specifications
  4. Check continuity and resistance of the coaxial cable between the module and antenna, looking for opens or shorts
  5. Verify power and ground at the Bluetooth module connector with a multimeter or test light
  6. If the antenna and wiring test good, substitute a known-good Bluetooth module to rule out internal failure
  7. After repair, clear codes and verify Bluetooth pairing and hands-free operation before returning the vehicle

Antenna faults that mimic module failure

  • A common misdiagnosis is replacing the Bluetooth module when the real problem is a pinched or corroded coaxial cable behind the dashboard or trim panel.
  • The antenna circuit often includes a small amplifier powered through the coaxial cable; a short in the cable can blow a fuse that also affects other communication features.
  • B0460 can be set by a completely dead antenna even if the Bluetooth module still powers up and shows no other symptoms, leading drivers to ignore it until hands-free fails.
  • Aftermarket phone chargers or USB accessories plugged into the vehicle can introduce electrical noise that the module interprets as an antenna fault, so unplug them during diagnosis.
  • On some vehicles, the Bluetooth antenna is shared with other wireless services, so a fault in that shared antenna can set B0460 along with codes for those systems.

Can I keep driving with B0460?

The vehicle remains safe to drive because the Bluetooth antenna circuit only affects hands-free communication and does not influence engine, braking, or steering systems. You can continue driving, but avoid relying on hands-free calling until the fault is repaired, and use a handheld phone only when legally permitted.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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