P2519

A/C Request A Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–33 (est.)

Symptoms

Air conditioner won't turn on
Unstable operation of the air conditioner
Check Engine light comes on
Reduced cooling efficiency

Causes

Open or short circuit in the air conditioner request circuit
Faulty A/C relay
Problems with the climate control unit
Engine control module (ECM) malfunction

How to Fix

Check the integrity of the air conditioner request circuit
Check the air conditioning relay and replace if necessary
Diagnose the climate control control unit
Check the operation of the engine control module (ECM)

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