Code result
P2519
A/C Request A Circuit
Moderate severity
What it means
General electrical fault on the A/C compressor request input A. This input tells the ECM that the HVAC controller wants the A/C compressor engaged. With the input invalid, the ECM cannot enable the compressor clutch — A/C does not cool, idle-up compensation is not applied.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Open or shorted A/C request wire
highOne of the most commonly reported causes for this code — check this first.
HVAC module not transmitting the request
mediumA plausible cause — test and verify before replacing parts.
Related help
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