OBD Guide
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B2544

Aux A/C Control Switch Reference Circuit Short To Battery

B2544 is an OBD-II diagnostic trouble code meaning: Aux A/C Control Switch Reference Circuit Short To Battery. Common causes: wiring harness damage, solenoid valve malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of the additional air conditioner
  • Complete failure of the air conditioning system
  • Check Engine Light Illuminated

Causes

  • Wiring harness damage
  • Solenoid valve malfunction
  • Problems in the control unit

How to Fix

  1. Check the integrity of the wiring harness
  2. Check the condition of the connectors
  3. Check the functionality of the solenoid valve
  4. Check control circuit voltage
  5. If necessary, replace the control unit

Related codes

B2545B2546

FAQ

What does the B2544 code mean?

B2544 is an OBD-II diagnostic trouble code that indicates: Aux A/C Control Switch Reference Circuit Short To Battery

What causes a B2544 error code?

The most common causes of B2544 include: Wiring harness damage; Solenoid valve malfunction; Problems in the control unit.

How do I fix a B2544 diagnostic trouble code?

To fix B2544: Check the integrity of the wiring harness. Check the condition of the connectors. Check the functionality of the solenoid valve. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2544?

Limited driving only, diagnose soon

How much does it cost to fix B2544?

The estimated repair cost for B2544 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat