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Home / DTC / C1768 — Rear height sensor - circuit failure

C1768 — Rear height sensor - circuit failure

Detailed page for trouble code C1768.

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C1768

LAND ROVER C — Chassis

Rear height sensor - circuit failure

Brand: LAND ROVER
Type: C — Chassis
AI status
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Page language: EN

Causes

  • Damaged or corroded sensor connector or wiring harness (open, short to ground or battery, high resistance)
  • Failed rear height/ride‑height sensor (potentiometer, Hall, or suspension position sensor)
  • Faulty suspension/air ride control module or body control module
  • Blown fuse or poor ground for the suspension sensors or control module
  • Water ingress or mechanical damage at the sensor or suspension linkage causing intermittent readings
  • Software/configuration or calibration error (after module replacement or coding)

Symptoms

  • Suspension warning lamp or message on dash (Ride Height Fault)
  • Vehicle rides low at rear or uneven ride height
  • Automatic leveling or height control disabled or in limp mode
  • Harsh or uncomfortable ride, compressor running excessively or not at all
  • DTC stored and may reappear after clearing if underlying fault persists

What to check

  • Connect an OEM-level scan tool and confirm C1768, note freeze-frame/live data and any related suspension codes
  • Inspect sensor and connector visually for corrosion, water, physical damage, or broken mounting/rod linkage
  • Visually follow wiring from sensor toward vehicle body for chafe, pinch points, or repairs
  • Check fuses and grounds for the suspension control module and sensors
  • With ignition ON (engine off where required by procedure) monitor sensor live data while moving the suspension linkage by hand or using service mode to see valid, smooth changes
  • Perform a wiggle test on wiring/connector while watching live data for intermittent faults

Signal parameters

  • Typical supply/reference voltage: ~5 V (check vehicle specification)
  • Expected sensor output: analog variable voltage proportional to height (commonly ~0.5–4.5 V across travel)
  • Short-to-ground indication: signal near 0–0.2 V
  • Short-to-battery indication: signal near supply voltage (≈5 V) or unreadable high value
  • Open circuit: no signal or floating, out-of-range value on scan tool
  • Signal should change smoothly and proportionally as suspension height is changed (no steps or dropouts)

Diagnostic algorithm

  1. Retrieve DTCs and freeze-frame using a manufacturer-capable scan tool; record related codes and live sensor values.
  2. Visually inspect rear height sensors, linkage and connectors for damage, corrosion or water entry; repair/clean connectors as needed.
  3. With ignition ON, backprob the sensor connector and measure reference supply, signal and ground. Compare to expected ranges; note exact values.
  4. Activate suspension control (service mode or operate suspension) and observe sensor output for smooth change; if no change, check mechanical linkage and sensor mount.
  5. If supply and ground are good but the signal is abnormal, disconnect sensor and measure sensor resistance or signal as specified by OEM; replace sensor if out of spec.
  6. If sensor tests good at harness but signal is bad at module, perform continuity/resistance checks between sensor connector and module; repair wiring or connector faults.
  7. Check and repair any poor ground points and fuses, then clear codes and road test to verify repair.
  8. If wiring and sensor are confirmed good and fault persists, consider module fault/firmware—verify software level and consult manufacturer procedures for module replacement or reprogramming.
  9. After repair, perform required calibration/leveling procedures per manufacturer service information and confirm no reoccurrence of C1768.

Likely causes

  • Wiring damage at rear suspension (pinch, chafe, corroded pins)
  • Sensor internal failure due to moisture or wear
  • Connector corrosion/mis-mate at sensor or module
  • Failed ground at module or sensor return
  • Intermittent wiring short when suspension moves

Fault status

⚠️ Status
Rear height sensor - circuit failure
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

Similar codes

C1767 C1769 C1284 C1277 C1263
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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