OBD Guide
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B2559

Aux A/C Blower Motor Relay Circuit Short to Battery

B2559 is an OBD-II diagnostic trouble code meaning: Aux A/C Blower Motor Relay Circuit Short to Battery. Common causes: damage to wire insulation, faulty fan relay. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • The auxiliary air conditioning fan runs constantly
  • Battery low
  • Air conditioning system malfunction

Causes

  • Damage to wire insulation
  • Faulty fan relay
  • Short circuit in wiring harness
  • Problems in the control unit

How to Fix

  1. Check the condition of the fan relay
  2. Inspect the wiring harness for damage
  3. Check circuit for short circuit
  4. Replace damaged components

Related codes

B2560B2561

FAQ

What does the B2559 code mean?

B2559 is an OBD-II diagnostic trouble code that indicates: Aux A/C Blower Motor Relay Circuit Short to Battery

What causes a B2559 error code?

The most common causes of B2559 include: Damage to wire insulation; Faulty fan relay; Short circuit in wiring harness; Problems in the control unit.

How do I fix a B2559 diagnostic trouble code?

To fix B2559: Check the condition of the fan relay. Inspect the wiring harness for damage. Check circuit for short circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2559?

Limited driving only, diagnose soon

How much does it cost to fix B2559?

The estimated repair cost for B2559 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat