B2564: Aux A/C Blower Speed 2 Circuit Short to Ground

What does B2564 mean?

B2564 is a diagnostic trouble code indicating "Aux A/C Blower Speed 2 Circuit Short to Ground". The ECU is detecting a voltage reading that is below the expected range in the climate control circuit. This typically points to a wiring short, a faulty sensor, or a grounding issue.

Symptoms you may notice

• Check engine light (MIL) illuminated on dashboard
• Intermittent warning lights
• Erratic gauge readings

Common causes

• Damaged or corroded wiring harness
• Loose or disconnected electrical connector
• Failed climate control sensor or actuator
• Blown fuse in the related circuit
• Poor ground connection

What should you do?

Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.