LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2015 >> QX80 Base, AWD >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Suspension Control System (Air LEVELIZER Control System) >> DTC/Circuit Diagnosis >> DTC C1801: VHCL Height Sensor >> DTC Logic >> DTC Detection Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Detection Logic

DTC Display item Malfunction detected condition Possible cause
C1801 VHCL HEIGHT SENSOR Signal voltage of the vehicle height sensor remains 0.2 V or less or 4.6 V or more continuously for 60 seconds during sensor voltage (4.5 - 5.5 V) output by the air levelizer control module.
  • Harness or connectors

    (Sensor circuit is open.)

  • Vehicle height sensor
  • Air levelizer control module
  • Rear suspension component parts