AutoCodes – Generic – B146B

B146B Code - Channel 3 Audio Speaker Output Circuit Low

Quick Answer

The standard equipment speaker system includes four full-range speakers. Common causes include Faulty Audio Amplifier, Audio Amplifier harness is open or shorted, Audio Amplifier circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B146B indicates Channel 3 Audio Speaker Output Circuit Low.
Common causes: Common causes include Faulty Audio Amplifier, Audio Amplifier harness is open or shorted, Audio Amplifier circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,157

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B146B Description

The standard equipment speaker system includes four full-range speakers. The two front speakers are mounted behind a removable bezel located on each outboard end of the lower instrument panel. With the premium speaker system, the standard front speakers are replace with an enclosure assembly that includes a 4 inch speaker and a 1 inch tweeter. The four rear speakers are mounted behind a grille located on each outboard end of the sport bar, above the rear seating area of the vehicle. This Diagnostic Trouble Code (DTC) sets if a Direct Current (DC) offset occurs on the output channel, the amplifier shall set a DTC after a maturity rate of four to six seconds.

OBDII Code B146B - Channel 3 Audio Speaker Output Circuit Low - AutoCodes.com — B146B Code - Channel 3 Audio Speaker Output Circuit Low

What does this mean?

What are the Possible Causes of the DTC B146B?

Faulty Audio Amplifier
Audio Amplifier harness is open or shorted
Audio Amplifier circuit poor electrical connection

How to Fix the DTC B146B?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B146B 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 B146B code?

Need more information on how to fix the B146B code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B146B code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B146B Chrysler — Channel 3 Audio Speaker Output Circuit Low
B146B Dodge — Channel 3 Audio Speaker Output Circuit Low
B146B Jeep — Channel 3 Audio Speaker Output Circuit Low
B146B RAM — Channel 3 Audio Speaker Output Circuit Low

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 B146B Code

1. What are the common symptoms of OBDII code B146B - Channel 3 Audio Speaker Output Circuit Low?

The common symptoms include distorted or very low audio output from the affected speaker, or no sound at all.

2. What are the possible causes of OBDII code B146B?

Possible causes of this code may include a faulty speaker, damaged speaker wiring, a defective audio amplifier, or a malfunction in the audio system control module.

3. How can I diagnose the issue related to OBDII code B146B?

You can start by visually inspecting the speaker and its wiring for any visible damage. Using a multimeter, you can test the speaker's resistance and check for continuity in the wiring. Further diagnostic steps may involve testing the audio amplifier and the control module.

4. I have identified a faulty speaker causing OBDII code B146B. How should I proceed with the repair?

If the speaker is the culprit, you should replace it with a new one of the same specifications. Ensure proper connection and secure wiring to prevent future issues.

5. Can a blown fuse be a possible reason for OBDII code B146B?

Yes, a blown fuse in the audio system circuit can also trigger this code. Check and replace any blown fuses as part of your troubleshooting process.

6. Is it safe to continue driving with OBDII code B146B present?

While the code itself may not directly affect the vehicle's drivability, it is recommended to address the issue promptly to restore the functionality of the audio system and prevent any potential safety concerns.

7. Are there any DIY repair tips for fixing OBDII code B146B?

DIY enthusiasts with some knowledge of car audio systems may attempt to troubleshoot and repair this issue, but if you're unsure, it's best to consult a professional mechanic or audio technician for assistance.

8. Can OBDII code B146B be intermittent in nature?

Yes, sometimes the issues related to this code can be intermittent, especially if they are caused by loose connections or wiring issues. Proper diagnosis is essential to pinpoint the exact cause.

9. How long does it usually take to fix OBDII code B146B?

The repair time can vary depending on the exact cause of the issue. Simple fixes like replacing a speaker may take a short time, while complex problems involving the audio system module could require more extensive troubleshooting.

10. Will resetting the OBDII system clear the B146B code?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing B146B is not addressed, the code is likely to reappear. It's crucial to diagnose and fix the root cause of the problem for a lasting solution.