OBD Guide
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B2404

Audio Steering Wheel Switch Circuit Fault

B2404 is an OBD-II diagnostic trouble code meaning: Audio Steering Wheel Switch Circuit Fault. Common causes: broken or damaged wiring harness, short circuit in the circuit. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • The audio control buttons on the steering wheel stopped working
  • Intermittent operation of buttons
  • The audio system does not respond to commands from the steering wheel

Causes

  • Broken or damaged wiring harness
  • Short circuit in the circuit
  • Faulty steering wheel switches
  • Problems with contacts in connectors

How to Fix

  1. Check the integrity of the wiring harness leading to the steering wheel
  2. Inspect the contacts in the connectors for oxidation or damage.
  3. Check the signal from the switches with a multimeter
  4. Replace faulty switches or harness if necessary

Related codes

B2405U0121U0140

FAQ

What does the B2404 code mean?

B2404 is an OBD-II diagnostic trouble code that indicates: Audio Steering Wheel Switch Circuit Fault

What causes a B2404 error code?

The most common causes of B2404 include: Broken or damaged wiring harness; Short circuit in the circuit; Faulty steering wheel switches; Problems with contacts in connectors.

How do I fix a B2404 diagnostic trouble code?

To fix B2404: Check the integrity of the wiring harness leading to the steering wheel. Inspect the contacts in the connectors for oxidation or damage.. Check the signal from the switches with a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2404?

Limited driving only, diagnose soon

How much does it cost to fix B2404?

The estimated repair cost for B2404 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat