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Home / DTC / C1A67 — Suspension Height Sensor Circuit Intermittent

C1A67 — Suspension Height Sensor Circuit Intermittent

Detailed page for trouble code C1A67.

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C1A67

LAND ROVER C — Chassis

Suspension Height Sensor Circuit Intermittent

Brand: LAND ROVER
Type: C — Chassis
Views: UK: 8 EN: 13 RU: 7
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Page language: EN

Causes

  • Corroded or loose sensor connector or pin
  • Broken, chafed, or intermittently contacting wiring in the harness
  • Failing or dirty suspension height sensor (potentiometer or position sensor)
  • Poor ground or intermittent 5V reference supply to the sensor
  • Water ingress or contamination at sensor or connector
  • Intermittent fault in the suspension control module / BCM or termination/communications

Symptoms

  • Suspension/service warning lamp or fault message displayed intermittently
  • Incorrect or fluctuating ride height readings in live data
  • Adaptive suspension faults, restricted suspension modes or limp mode
  • Vehicle not sitting level or sporadic changes in ride height
  • Faults clear temporarily after ignition cycle or clearing codes

What to check

  • Read stored and pending codes with a capable scan tool; note freeze-frame and occurrence count.
  • Inspect sensor connector and wiring for corrosion, water, abrasion, broken strands, or loose pins.
  • Back-probe sensor connector and observe live data while raising/lowering the suspension or moving the suspension arm.
  • Wiggle test wiring and connector while monitoring live signal for dropouts or noise.
  • Measure reference voltage and ground at the sensor connector with ignition ON.
  • Check continuity and resistance of harness between sensor and module; look for intermittent open circuits.

Signal parameters

  • Reference supply: typically a regulated 5 V reference from the control module (verify exact value in service manual).
  • Sensor output: variable voltage proportional to height — typically in the range ~0.2 V to ~4.8 V across travel (model-dependent).
  • Ground: good chassis or module ground near 0 V; low resistance to battery negative.
  • Resistance: many height sensors are potentiometers — typical static resistance values often in the kiloohm range (refer to model spec).
  • Noise: intermittent faults may show sudden spikes, dropouts to open-circuit voltage, or values jumping when the harness is moved.

Diagnostic algorithm

  1. Connect a diagnostic scanner that can read suspension height sensor live data. Record data and freeze-frame info for C1A67.
  2. Reproduce the fault: cycle ignition and operate suspension (jack up wheels or use service mode) while watching live sensor output for instability or dropouts.
  3. Visually inspect the sensor, linkage and wiring harness from sensor to body control/suspension module. Repair rubbed, pinched or damaged wiring.
  4. With ignition ON, back-probe the sensor connector: verify 5 V reference present, sensor output varies with travel, and ground continuity is good. Note any intermittent loss.
  5. Perform a wiggle test on the harness and connector while monitoring the live signal to locate intermittent wiring or connector faults.
  6. If reference/ground are correct but output is intermittent or out of range, disconnect sensor and measure its resistance/position output per service specifications (or swap with known-good sensor if available).
  7. Repair or replace any damaged wiring or corroded connector pins; apply dielectric grease to protect connector after repair.
  8. Replace the sensor if internal failure is confirmed. After repair, clear codes and perform suspension height calibration/adaptive suspension relearn with the manufacturer scan tool as required.
  9. Road test and re-scan to ensure the code does not return and sensor readings remain stable across operating conditions.
  10. If fault persists with a known-good sensor and wiring verified, investigate the suspension control module/BCM inputs and CAN/LIN communication for intermittent faults.

Likely causes

  • Connector corrosion at the sensor (common on ride height sensors near suspension components)
  • Wiring harness damaged where it flexes (suspension travel areas) or rubbed through
  • Bad crimp or intermittent pin contact inside connector
  • Sensor internal wear or intermittent internal open/short when moved
  • Loose sensor mounting or linkage causing irregular readings

Fault status

⚠️ Status
Suspension height sensor circuit intermittently faulting — signal missing or unstable
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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