B1085 2017 GMC Sierra Code - Left Front Instrument Panel Audio Output 7 Circuit
Quick Answer
The Media Oriented Systems Transport (MOST) is a high-speed multimedia network technology. Common causes include Faulty Audio Amplifier, Faulty Left Front Instrument Panel Speaker, Left Front Instrument Panel Speaker harness is open or shorted. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- B1085 2017 GMC Sierra indicates Left Front Instrument Panel Audio Output 7 Circuit.
- Common causes
- Common causes include Faulty Audio Amplifier, Faulty Left Front Instrument Panel Speaker, Left Front Instrument Panel Speaker harness is open or shorted.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code B1085 2017 GMC Sierra Description
The audio amplifier is a participant on the MOST network. The audio amplifier receives audio input and control information from the MOST bus.
Each of the audio output channel circuits (+) and (−), at the audio amplifier have a DC bias voltage that is approximately one-half of the battery voltage. When using a DMM, each of the audio output channel circuits will measure approximately 6.5V DC. The audio being played on the system is produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone to move and produce sound.
What are the Possible Causes of the DTC B1085 2017 GMC Sierra?
- Faulty Audio Amplifier
- Faulty Left Front Instrument Panel Speaker
- Left Front Instrument Panel Speaker harness is open or shorted
- Left Front Instrument Panel Speaker circuit poor electrical connection
How to Fix the DTC B1085 2017 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
B1085:02 Left Front Instrument Panel Audio Output 7 Circuit Short to Ground
B1085:04 Left Front Instrument Panel Audio Output 7 Circuit Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1085 2017 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the B1085 2017 GMC Sierra code?
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Frequently Asked Questions about B1085 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code B1085 in a 2017 GMC Sierra related to the Left Front Instrument Panel Audio Output 7 Circuit?
- Common symptoms include loss of sound from the left front speakers, distorted audio quality, or complete audio system failure.
2. What are the possible causes of OBDII code B1085 in a 2017 GMC Sierra?
- The code B1085 can be triggered by issues such as a faulty audio amplifier, damaged wiring or connectors, a blown fuse, or a malfunctioning audio control module.
3. How can I diagnose the source of OBDII code B1085 in my 2017 GMC Sierra?
- To diagnose the issue, you may need to inspect the wiring and connectors related to the left front audio output, test the audio amplifier, check for blown fuses, and scan the audio control module for faults.
4. Can I still drive my 2017 GMC Sierra with OBDII code B1085 present?
- It is generally safe to drive the vehicle with this code, but you may experience issues with the audio system. It is recommended to address the problem promptly to avoid further complications.
5. How can I repair OBDII code B1085 in my 2017 GMC Sierra at home?
- Depending on the exact cause, you may be able to repair the issue at home by replacing a blown fuse, repairing damaged wiring, or reconnecting loose connectors. However, more complex issues may require professional assistance.
6. Will resetting the OBDII system clear the B1085 code in my 2017 GMC Sierra?
- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again.
7. Is OBDII code B1085 in a 2017 GMC Sierra a serious problem?
- While this code primarily affects the audio system, it is important to address it to ensure proper functioning of the vehicle's entertainment features and to prevent potential electrical issues in the future.
8. How much does it typically cost to repair OBDII code B1085 in a 2017 GMC Sierra?
- The cost of repairing this code can vary depending on the specific cause of the issue. Simple fixes like replacing a fuse may be relatively inexpensive, while more complex repairs involving components like the audio amplifier can be more costly.
9. Can extreme temperatures or humidity affect the occurrence of OBDII code B1085 in a 2017 GMC Sierra?
- Yes, extreme temperatures or humidity can potentially exacerbate electrical issues in the vehicle, including those related to the audio system that may trigger the B1085 code.
10. How can I prevent OBDII code B1085 from reoccurring in my 2017 GMC Sierra?
- Regularly inspecting and maintaining the audio system components, ensuring proper wiring connections, and addressing any issues promptly can help prevent the reoccurrence of the B1085 code in your vehicle.
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