OBD Guide
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B113B

Rear Audio Switch Circuit Short to Ground

B113B is an OBD-II diagnostic trouble code meaning: Rear Audio Switch Circuit Short to Ground. Common causes: damage to the switch circuit wires, short circuit in wiring harness. Estimated repair cost: $22–111.

Severity
✅ Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–111 (est.)

Symptoms

  • Rear audio switch malfunction
  • Audio system malfunctions
  • Illuminated Check Engine Light or Dashboard Warning

Causes

  • Damage to the switch circuit wires
  • Short circuit in wiring harness
  • Rear audio switch malfunction
  • Connector problems or contact corrosion

How to Fix

  1. Check the integrity of the wires in the rear audio switch circuit
  2. Examine the wiring harness for short circuits.
  3. Test the switch itself for serviceability
  4. Check connectors and contacts for corrosion or damage
  5. Replace damaged components if necessary

FAQ

What does the B113B code mean?

B113B is an OBD-II diagnostic trouble code that indicates: Rear Audio Switch Circuit Short to Ground

What causes a B113B error code?

The most common causes of B113B include: Damage to the switch circuit wires; Short circuit in wiring harness; Rear audio switch malfunction; Connector problems or contact corrosion.

How do I fix a B113B diagnostic trouble code?

To fix B113B: Check the integrity of the wires in the rear audio switch circuit. Examine the wiring harness for short circuits.. Test the switch itself for serviceability. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B113B?

Do not drive — repair immediately

How much does it cost to fix B113B?

The estimated repair cost for B113B is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat