OBD Guide
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B146B

Channel 3 Audio Speaker Output Circuit Low

B146B is an OBD-II diagnostic trouble code meaning: Channel 3 Audio Speaker Output Circuit Low. Common causes: broken wires in the harness, poor contact in speaker connector. Estimated repair cost: $11–56.

Severity
✅ Low
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$11–56 (est.)

Symptoms

  • No sound from one of the speakers
  • Distorted sound
  • Intermittent sound

Causes

  • Broken wires in the harness
  • Poor contact in speaker connector
  • Speaker malfunction
  • Problems with sound amplifier
  • Head unit malfunction

How to Fix

  1. Check the integrity of the wires in the harness
  2. Inspect the speaker connectors for oxidation or damage.
  3. Check the performance of the speaker
  4. Diagnose the audio amplifier and head unit

Related codes

B146AB146CB146D

FAQ

What does the B146B code mean?

B146B is an OBD-II diagnostic trouble code that indicates: Channel 3 Audio Speaker Output Circuit Low

What causes a B146B error code?

The most common causes of B146B include: Broken wires in the harness; Poor contact in speaker connector; Speaker malfunction; Problems with sound amplifier.

How do I fix a B146B diagnostic trouble code?

To fix B146B: Check the integrity of the wires in the harness. Inspect the speaker connectors for oxidation or damage.. Check the performance of the speaker. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B146B?

Limited driving only, diagnose soon

How much does it cost to fix B146B?

The estimated repair cost for B146B is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat