C1866 — Air Suspension Rear Inflator Solenoid Output Circuit Open

What it means

C1866 is an OBD-II diagnostic trouble code: Air Suspension Rear Inflator Solenoid Output Circuit Open.

Typical fix

Confirm the code with an OBD-II scanner, then inspect the component or circuit named above. Consult a vehicle-specific service manual for the full diagnostic and repair procedure.