B1045 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado?
- 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 2018 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.
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 2018 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 B1045 2018 Chevrolet Silverado code?
Need more information on how to fix the B1045 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1045 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B1045 2018 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code B1045 in a 2018 Chevrolet Silverado related to the Left Rear Door Audio Output 3 Circuit?
- Common symptoms include no sound from the left rear door speaker, distorted audio, or complete audio failure in that specific speaker.
2. What are the possible causes of OBDII code B1045 in a 2018 Chevrolet Silverado?
- The code B1045 can be triggered by issues such as a faulty speaker, damaged wiring, a defective amplifier, or a malfunctioning audio control module.
3. How can I diagnose the OBDII code B1045 in my 2018 Chevrolet Silverado related to the Left Rear Door Audio Output 3 Circuit?
- You can diagnose the issue by checking the wiring connections, testing the speaker for functionality, inspecting the amplifier, and scanning the audio control module for any faults.
4. Can a blown fuse cause OBDII code B1045 in a 2018 Chevrolet Silverado?
- Yes, a blown fuse related to the audio system can also trigger the B1045 code, so it's recommended to check the fuses as part of the diagnostic process.
5. What are some repair tips for resolving OBDII code B1045 in a 2018 Chevrolet Silverado?
- Repair tips include checking and repairing any damaged wiring, replacing a faulty speaker, repairing or replacing the amplifier, or reprogramming the audio control module if necessary.
6. Is it safe to continue driving my 2018 Chevrolet Silverado with OBDII code B1045 related to the Left Rear Door Audio Output 3 Circuit?
- While the vehicle may still be operable, it's recommended to address the audio system issue promptly to prevent further damage and ensure optimal audio functionality.
7. Can resetting the audio system or disconnecting the battery resolve OBDII code B1045 in a 2018 Chevrolet Silverado?
- Resetting the audio system or disconnecting the battery may temporarily clear the code, but if the underlying issue persists, the code is likely to reappear.
8. Do I need specialized equipment to diagnose and repair OBDII code B1045 in my 2018 Chevrolet Silverado?
- While specialized diagnostic tools may be helpful, basic tools such as a multimeter, wiring diagram, and knowledge of automotive electrical systems can also be used to diagnose and repair the issue.
9. Are there any recalls or technical service bulletins related to OBDII code B1045 in a 2018 Chevrolet Silverado?
- It's recommended to check with a Chevrolet dealership or online resources for any applicable recalls or technical service bulletins related to the B1045 code in your specific vehicle.
10. How much can I expect to pay for repairing OBDII code B1045 in a 2018 Chevrolet Silverado at a dealership or repair shop?
- Repair costs for OBDII code B1045 can vary depending on the root cause of the issue, but it's advisable to obtain a diagnosis and repair estimate from a certified technician before proceeding with any repairs.
Discuss the causes and fixes for B1045 2018 Chevrolet Silverado OBDII Code
Code B1045 2018 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
