B0170
Audio System Main Unit Malfunction
Lowelectrical
Overview
The B0170 code indicates that the body control module has detected a audio system main unit malfunction condition. This relates to the vehicle's body electrical systems, which control comfort, convenience, and safety features. When this code is stored, the affected system or component may not operate correctly, potentially impacting safety or comfort features.
Symptoms
- Seatbelt warning chime not functioning
- Door locks not responding to remote or switch
- HVAC blower not blowing air
- Windshield wipers not operating or stuck
Common Causes
- Damaged clock spring in steering column
- Blown fuse or faulty relay
- Poor ground connection
- Faulty SRS/airbag control module
Diagnosis Steps
- 1Connect an OBD-II scanner and read all stored body control module trouble codes
- 2Inspect the affected circuit fuse and relay; replace if blown or faulty
- 3Check the wiring harness and connectors for damage, corrosion, or loose pins
- 4Test circuit voltage and ground with a multimeter at the affected component
- 5Verify battery voltage is within specification (12.4V+ engine off)
Estimated Repair Cost
$75 — $800
Cost varies by vehicle, location, and repair shop. Includes parts and labor.
Commonly Affected Vehicles
Subaru OutbackHyundai SonataGMC SierraToyota Camry
Related Codes
More Electrical Codes
B0001Driver Frontal Airbag Deployment Loop Circuit Open
CriticalB0002Driver Frontal Airbag Deployment Loop Circuit Short to Ground
CriticalB0003Driver Frontal Airbag Deployment Loop Circuit Short to Battery
CriticalB0004Driver Frontal Airbag Deployment Loop Resistance Too High
CriticalB0005Driver Frontal Airbag Deployment Loop Resistance Too Low
CriticalB0006Passenger Frontal Airbag Deployment Loop Circuit Open
CriticalFrequently Asked Questions
Driving with the airbag warning light on means the SRS system may not deploy in a crash, which significantly increases injury risk. Have the system inspected as soon as possible.