B1045 2016 GMC Sierra Code - Left Rear Door Audio Output 3 Circuit
Quick Answer
Vehicles without Amplifier: Each of the audio output channel circuits (+) and (-), at the radio have a DC bias voltage that is approximately one-half of battery voltage. Common causes include Faulty Radio Unit, Faulty Audio Amplifier (If equipped), Faulty Left Rear Door Speaker (Subwoofer for vehicles with Amplifier). 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
- B1045 2016 GMC Sierra indicates Left Rear Door Audio Output 3 Circuit.
- Common causes
- Common causes include Faulty Radio Unit, Faulty Audio Amplifier (If equipped), Faulty Left Rear Door Speaker (Subwoofer for vehicles with Amplifier).
- 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 B1045 2016 GMC Sierra Description
Each of the audio output channel circuits (+) and (-), at the radio have a DC bias voltage that is approximately one-half of battery voltage. When using a DMM, each of the audio output channel circuits will measure approximately 6.5 V 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 frequency (Hz) of the AC voltage signal is directly related to the frequency of the input (audio source playing) to the audio system. Both the DC bias voltage and the AC voltage signals are needed for the audio system to properly produce sound.
Vehicles with Amplifier:
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.
What are the Possible Causes of the DTC B1045 2016 GMC Sierra?
- Faulty Radio Unit
- Faulty Audio Amplifier (If equipped)
- Faulty Left Rear Door Speaker (Subwoofer for vehicles with Amplifier)
- Left Rear Door Speaker (Subwoofer for vehicles with Amplifier) harness is open or shorted
- Left Rear Door Speaker (Subwoofer for vehicles with Amplifier) circuit poor electrical connection
How to Fix the DTC B1045 2016 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
B1045:02 Left Rear Door Audio Output 3 Circuit Short to Ground
B1045:04 Left Rear Door Audio Output 3 Circuit Open
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1045 2016 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.
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Frequently Asked Questions about B1045 2016 GMC Sierra Code
1. What are common symptoms of OBDII code B1045 on a 2016 GMC Sierra related to the Left Rear Door Audio Output 3 Circuit?
- Common symptoms include no sound from the left rear speaker, distorted audio, or complete audio failure from that specific speaker.
2. What are the possible causes of OBDII code B1045 in a 2016 GMC Sierra indicating an issue with the Left Rear Door Audio Output 3 Circuit?
- Possible causes include a faulty speaker, damaged wiring, loose connections, or a malfunctioning audio amplifier in the left rear door.
3. How can I diagnose the OBDII code B1045 on my 2016 GMC Sierra that points to the Left Rear Door Audio Output 3 Circuit issue?
- You can start by visually inspecting the speaker, wiring, and connections in the left rear door. Using a multimeter to check for continuity and proper voltage can help pinpoint the problem.
4. Is it possible to repair OBDII code B1045 related to the Left Rear Door Audio Output 3 Circuit in a 2016 GMC Sierra without professional help?
- Depending on your familiarity with automotive electronics, you may be able to repair the issue by replacing a faulty speaker, repairing damaged wiring, or securing loose connections. However, complex problems may require professional assistance.
5. Can OBDII code B1045 on a 2016 GMC Sierra indicating a problem with the Left Rear Door Audio Output 3 Circuit be reset without fixing the underlying issue?
- Resetting the code without addressing the root cause, such as a faulty speaker or wiring problem, is not recommended. The issue will likely persist, and the code will reappear after a reset.
6. Are there any specific tools or equipment needed to diagnose and repair OBDII code B1045 in a 2016 GMC Sierra related to the Left Rear Door Audio Output 3 Circuit?
- Basic tools like a multimeter, wire strippers, electrical tape, and a screwdriver may be necessary for diagnosing and repairing issues with the left rear door audio output circuit.
7. What should I do if I encounter intermittent audio issues in the left rear door of my 2016 GMC Sierra, possibly related to OBDII code B1045?
- If you experience intermittent audio problems, it's crucial to inspect the speaker, wiring, and connections thoroughly. Check for any signs of damage or loose connections that may be causing the intermittent issue.
8. How can I prevent OBDII code B1045 from reoccurring after repairing the Left Rear Door Audio Output 3 Circuit problem in my 2016 GMC Sierra?
- To prevent the code from reoccurring, ensure all repairs are done correctly, use quality replacement parts if needed, and perform thorough testing to confirm that the audio output circuit in the left rear door is functioning properly.
9. Are there any common mistakes to avoid when diagnosing and repairing OBDII code B1045 in a 2016 GMC Sierra related to the Left Rear Door Audio Output 3 Circuit?
- Common mistakes to avoid include overlooking loose connections, misdiagnosing the issue as a speaker problem when it's a wiring issue, and neglecting to test the repaired circuit thoroughly before considering the problem solved.
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