Code result
U0324
Software Incompatibility with HVAC Control Module
Moderate severity
What it means
The HVAC controller is running software incompatible with the rest of the network. Climate functions may default to a basic operating mode.
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
Incompatible flash after HVAC swap
highOne of the most commonly reported causes for this code — check this first.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
CAN terminating resistor (120 Ω) drifted out of spec
lowLess common, but worth ruling out after the more likely causes.
Related help
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