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Home >> Infiniti >> 2011 >> M37 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 22 (Suspension Control System) >> Air LEVELIZER Control System >> DTC/Circuit Diagnosis >> DTC C1801: VHCL Height Sensor >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2012 Infiniti QX56 and 2011 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
MALFUNCTION DETECTED CONDITION AND POSSIBLE CAUSE

DTC Display itemI 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
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