AutoCodes – Chevrolet – B1085 2015 Chevrolet Silverado

B1085 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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.

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Code Popularity 316

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1085 2015 Chevrolet Silverado Description

The Media Oriented Systems Transport (MOST) is a high-speed multimedia network technology. The serial MOST bus uses a ring topology and synchronous data communication to transmit audio, video, data and control information between any devices attached.
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.

OBDII Code B1085 2015 Chevrolet Silverado - Left Front Instrument Panel Audio Output 7 Circuit - AutoCodes.com — B1085 2015 Chevrolet Silverado Code - Left Front Instrument Panel Audio Output 7 Circuit

What does this mean?

What are the Possible Causes of the DTC B1085 2015 Chevrolet Silverado?

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 2015 Chevrolet Silverado?

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.

What does this mean?

Code Tech Notes

B1085:01 Left Front Instrument Panel Audio Output 7 Circuit Short to Battery
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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado code?

Need more information on how to fix the B1085 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1085 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B1085 in a 2015 Chevrolet Silverado?

- Common symptoms include no sound from the left front speaker, distorted audio output, or complete audio system failure.

2. What can cause the OBDII code B1085 in a 2015 Chevrolet Silverado?

- The code B1085 typically indicates a malfunction in the left front instrument panel audio output circuit, which can be caused by a faulty speaker, wiring issue, or a problem with the audio control module.

3. How can I diagnose the OBDII code B1085 in my 2015 Chevrolet Silverado?

- To diagnose the B1085 code, you can start by checking the left front speaker for proper connection and functionality. Inspect the wiring leading to the speaker and test the audio control module for any faults.

4. Is it safe to continue driving with the OBDII code B1085 in a 2015 Chevrolet Silverado?

- While driving with the B1085 code may not affect the overall performance of the vehicle, it is recommended to address the issue promptly to ensure proper functioning of the audio system.

5. Can I repair the OBDII code B1085 in my 2015 Chevrolet Silverado myself?

- Depending on your level of automotive expertise, you may be able to repair the B1085 code yourself by checking and replacing the left front speaker, repairing any damaged wiring, or addressing issues with the audio control module.

6. Will resetting the OBDII code B1085 in a 2015 Chevrolet Silverado make it go away permanently?

- Resetting the B1085 code may temporarily clear the error, but if the underlying issue with the left front instrument panel audio output circuit is not resolved, the code is likely to reappear.

7. How much does it typically cost to repair the OBDII code B1085 in a 2015 Chevrolet Silverado at a dealership?

- The cost of repairing the B1085 code at a dealership can vary depending on the specific issue causing the code, but it may involve diagnostic fees, parts replacement costs, and labor charges.

8. Are there any common DIY fixes for the OBDII code B1085 in a 2015 Chevrolet Silverado?

- Some common DIY fixes for the B1085 code include checking and securing the speaker connections, inspecting and repairing any damaged wiring, and resetting the audio system.

9. Can extreme weather conditions affect the occurrence of the OBDII code B1085 in a 2015 Chevrolet Silverado?

- Extreme weather conditions such as excessive heat or moisture can potentially impact the electrical components related to the left front instrument panel audio output circuit, leading to the B1085 code.

10. Is the OBDII code B1085 specific to the 2015 Chevrolet Silverado, or can it occur in other vehicle models?

- While the B1085 code is specific to the left front instrument panel audio output circuit in the 2015 Chevrolet Silverado, similar audio output circuit issues can trigger different codes in other vehicle models.