AutoCodes – Generic – B1065:02

B1065:02 Code - Left Rear Door Audio Output 5 Circuit Short to Ground

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: B1065:02 indicates Left Rear Door Audio Output 5 Circuit Short to Ground.
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.

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Code Popularity 256

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
Comments
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Code B1065:02 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.
The Diagnostic Trouble Code (DTC) will be set when a short to ground is detected on the specified (+) (positive) or (−) (negative) signal circuit.

OBDII Code B1065:02 - Left Rear Door Audio Output 5 Circuit Short to Ground - AutoCodes.com — B1065:02 Code - Left Rear Door Audio Output 5 Circuit Short to Ground

What does this mean?

What are the Possible Causes of the DTC B1065:02?

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 B1065:02?

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

B1065:01 Left Rear Door Audio Output 5 Circuit Short to Battery
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 B1065:02 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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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.