DTC C1A03-64: Left Front Height Sensor - Signal plausibility failure: Action

NOTE: If any height sensor fixings were slackened or found to be loose or if a height sensor was changed, the height sensor calibration procedure MUST be performed

Disconnect electrical connector to height sensor and inspect connector pins & terminals for evidence of corrosion or water ingress
If no corrosion found, disconnect harness at control module. Check for short circuits between any of the three terminals and vehicle ground
Check for electrical continuity between the two connectors for each of the three terminals
Reconnect electrical connector at control module only. Check voltages at terminals within height sensor connector (sensor not connected): voltage to sensor ground connector should be ~0V, voltage to sensor signal connector should be ~0V, voltage to sensor supply connector should be ~5V. All voltages should be within ± 0.15V. Clear DTC and retest
If no circuit faults are present, check and install new height sensor as required. Clear DTC and retest