OBD Guide
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B146C

Channel 3 Audio Speaker Output Circuit High

B146C is an OBD-II diagnostic trouble code meaning: Channel 3 Audio Speaker Output Circuit High. Common causes: audio amplifier malfunction, damage to speaker wiring harness. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–167 (est.)

Symptoms

  • Sound distortion in one of the speakers
  • Complete absence of sound from channel 3 speaker
  • Intermittent sound loss

Causes

  • Audio amplifier malfunction
  • Damage to speaker wiring harness
  • Short circuit in speaker circuit
  • Malfunction of the speaker itself

How to Fix

  1. Check the integrity of the channel 3 speaker wiring harness
  2. Check speaker impedance
  3. Diagnose an audio system amplifier
  4. If necessary, replace the speaker or amplifier

Related codes

B146DB146BB146A

FAQ

What does the B146C code mean?

B146C is an OBD-II diagnostic trouble code that indicates: Channel 3 Audio Speaker Output Circuit High

What causes a B146C error code?

The most common causes of B146C include: Audio amplifier malfunction; Damage to speaker wiring harness; Short circuit in speaker circuit; Malfunction of the speaker itself.

How do I fix a B146C diagnostic trouble code?

To fix B146C: Check the integrity of the channel 3 speaker wiring harness. Check speaker impedance. Diagnose an audio system amplifier. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B146C?

Do not drive — repair immediately

How much does it cost to fix B146C?

The estimated repair cost for B146C is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat