B1065 GMC Code - Left Rear Door Audio Output 5 Circuit
Quick Answer
The Media Oriented Systems Transport (MOST) is a high-speed multimedia network technology. Common causes include Faulty Audio Amplifier, Faulty Left Rear Door Speaker, Left Rear Door 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
- B1065 GMC indicates Left Rear Door Audio Output 5 Circuit.
- Common causes
- Common causes include Faulty Audio Amplifier, Faulty Left Rear Door Speaker, Left Rear Door 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 B1065 GMC 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 B1065 GMC?
- Faulty Audio Amplifier
- Faulty Left Rear Door Speaker
- Left Rear Door Speaker harness is open or shorted
- Left Rear Door Speaker circuit poor electrical connection
How to Fix the DTC B1065 GMC?
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
B1065:02 Left Rear Door Audio Output 5 Circuit Short to Ground
B1065:04 Left Rear Door Audio Output 5 Circuit Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1065 GMC 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.
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Information for Specific GMC Models
- B1065 2014 GMC Sierra — Left Rear Door Audio Output 5 Circuit
- B1065 2015 GMC Sierra — Left Rear Door Audio Output 5 Circuit
- B1065 2016 GMC Sierra — Left Rear Door Audio Output 5 Circuit
- B1065 2017 GMC Sierra — Left Rear Door Audio Output 5 Circuit
- B1065 2018 GMC Sierra — Left Rear Door Audio Output 5 Circuit
Frequently Asked Questions about B1065 GMC Code
1. What are the common symptoms of OBDII code B1065 GMC?
- Common symptoms include no audio output from the left rear door speaker, distorted sound, or complete silence.
2. What could be causing the OBDII code B1065 GMC to trigger?
- The code may be triggered by a damaged speaker, faulty wiring, a blown fuse, or a malfunctioning audio amplifier in the left rear door.
3. How can I diagnose the issue related to the Left Rear Door Audio Output 5 Circuit?
- You can start by checking the speaker for physical damage, inspecting the wiring for any cuts or breaks, and testing the audio amplifier for functionality.
4. Is it safe to continue driving with OBDII code B1065 GMC active?
- While it may not affect the overall drivability of the vehicle, it is recommended to address the issue promptly to avoid potential long-term damage to the audio system.
5. Can I repair OBDII code B1065 GMC on my own?
- If you have experience working with car audio systems, you may be able to troubleshoot and repair the issue yourself. Otherwise, seeking the help of a professional technician is advised.
6. How much does it typically cost to repair OBDII code B1065 GMC?
- The cost of repair can vary depending on the exact cause of the issue. It could range from a simple speaker replacement to more extensive wiring repairs or audio system component replacement.
7. Are there any temporary fixes I can try for OBDII code B1065 GMC?
- You can try checking and resetting the audio system fuse, ensuring all connections are secure, and testing the speaker with an external audio source to isolate the problem.
8. Will resetting the OBDII code B1065 GMC make the issue go away permanently?
- Resetting the code may temporarily turn off the warning light, but if the root cause of the problem is not fixed, the code is likely to reappear once the issue is detected again.
9. How can I prevent OBDII code B1065 GMC from recurring in the future?
- Regularly inspecting and maintaining your vehicle's audio system, avoiding water damage to the speakers, and ensuring proper wiring connections can help prevent this issue from happening again.
10. Does OBDII code B1065 GMC affect the overall performance of the vehicle?
- This code specifically relates to the audio system in the left rear door and does not directly impact the vehicle's engine performance or safety features.
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