OBD Guide
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B146D

Channel 3 Audio Speaker Output Circuit Open

B146D is an OBD-II diagnostic trouble code meaning: Channel 3 Audio Speaker Output Circuit Open. Common causes: broken wires in the harness going to the speaker, speaker malfunction. Estimated repair cost: $22–167.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–167 (est.)

Symptoms

  • No sound from one of the speakers
  • Sound distortion in only one channel
  • Clicking or crackling sounds in the speaker before the sound stops completely

Causes

  • Broken wires in the harness going to the speaker
  • Speaker malfunction
  • Poor contact in speaker connector
  • Damage to the wiring harness in the doorway
  • Amplifier or head unit malfunction

How to Fix

  1. Check the integrity of the wires to the speaker
  2. Check speaker resistance (usually 4-8 ohms)
  3. Inspect connectors for oxidation or damage
  4. Check the presence of signal from the head unit/amplifier
  5. If necessary, replace the speaker or repair the wiring harness

Related codes

B146CB146EB146F

FAQ

What does the B146D code mean?

B146D is an OBD-II diagnostic trouble code that indicates: Channel 3 Audio Speaker Output Circuit Open

What causes a B146D error code?

The most common causes of B146D include: Broken wires in the harness going to the speaker; Speaker malfunction; Poor contact in speaker connector; Damage to the wiring harness in the doorway.

How do I fix a B146D diagnostic trouble code?

To fix B146D: Check the integrity of the wires to the speaker. Check speaker resistance (usually 4-8 ohms). Inspect connectors for oxidation or damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B146D?

Yes, but get it checked soon

How much does it cost to fix B146D?

The estimated repair cost for B146D is $22–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat