OBD Guide

P2524

A/C Request B Circuit High

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–33 (est.)

Symptoms

  • Air conditioner won't turn on
  • Reduced performance of the air conditioning system
  • Check Engine light comes on
  • The fan runs at maximum speed

Causes

  • Short circuit in A/C request circuit
  • Faulty A/C relay
  • Wiring harness damage
  • Problems with the engine control unit (ECU)
  • Contact corrosion

How to Fix

  1. Check the integrity of the wiring harness
  2. Test the air conditioner relay
  3. Measure the resistance in the circuit
  4. Check connections and contacts
  5. Replace damaged components if necessary

Related codes

Error P2524 by Vehicle Brand