Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Genesis G90 3.3T Premium, AWDFACTORY OEM SERVICE PROCEDURE
Audio/Video/Navigation DTCS
AUDIO/VIDEO/NAVIGATION DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC B2801 | 00: MM CAN Signal Line Error |
| DTC B2803 | 00: Timeout Multimedia CAN Message (AMP) |
| DTC B2817 | 00: I-CAN Bus Off Error |
| DTC B2824 | 00: FRT MIC Connection Error |
| DTC B2827 | 00: GPS Antenna Open State |
| DTC B2841 | 00: USB Communication Error |
| DTC B2849 | 00: SXM Antenna Open State |
| DTC B284F | 00: DAB Antenna Open State |
| DTC B2851 | 00: DMB Antenna Open State |
| DTC B2856 | 00: Room Mirror Button Stuck Error |
| DTC B2861 | 00: LVDS Front Cable Fault |
| DTC B2862 | 00: LVDS Rear Right Cable Fault |
| DTC B2863 | 00: LVDS Rear Left Cable Fault |
| DTC B28B2 | 00: MIC In1 In open load |
| DTC B28B5 | 00: MIC In2 In open load |
| DTC B28B8 | 00: MIC In3 In open load |
| DTC B28C3 | 00: FM2 Radio Antenna No Connection State (Sub Ant) |
| DTC B28C7 | 00: LTE1/3G antenna open load |
| DTC B28CA | 00: LTE2 antenna open load |
| DTC B2949 | 00: Radio Antenna Connection & Receive Quality |
| DTC B2954 | 00: Rear USB Communication Error |
| DTC B2955 | 00: Timeout Multimedia CAN Message (Cluster) |
| DTC B2956 | 00: Timeout Multimedia CAN Message (HUD) |
| DTC B2957 | 00: Timeout Multimedia CAN Message (Clock) |
| DTC B2958 | 00: Timeout Multimedia CAN Message (CGW) |
| DTC B29C3 | 00: Sticking Key on Central Control Panel_HU Detection |
| DTC B29C6 | 00: RRC Button Stuck Error |
| DTC B29D0 | 00: CCP Connection Error |
| DTC B29D1 | 00: RRC Connection Error |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.