| Possible cause |
- Low battery voltage
- Electronic jamming from outside, or inferior condition of broadcasting station radio wave
- Jamming from aftermarket electronic equipment (two-way radio, navigation system, mobile phone, etc.)
- Antenna plug poor connection
- Antenna feeder malfunction
- SIRIUS satellite radio unit malfunction
- Open or short circuit in wiring harness between SIRIUS satellite radio unit and audio unit
- Communication error between SIRIUS satellite radio unit and audio unit
- Audio unit malfunction
- Antenna rod not installed
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