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Home / DTC / C1041 — Front axle piston - Pressure sensor

C1041 — Front axle piston - Pressure sensor

Detailed page for trouble code C1041.

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C1041

LAND ROVER C — Chassis

Front axle piston - Pressure sensor

Brand: LAND ROVER
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed front axle piston pressure sensor
  • Open, shorted or corroded sensor wiring or connector
  • Poor ground or lost 5 V reference/supply to sensor
  • Contaminated or mechanically jammed sensor
  • Faulty suspension control module or related ECU software
  • Intermittent connection due to moisture or vibration

Symptoms

  • ABS/traction/suspension warning lamp or message on dash
  • Reduced suspension performance or loss of adaptive damping/air suspension functions
  • Vehicle ride height incorrect or raising/lowering fault messages
  • Diagnostic trouble codes related to axle/suspension sensors present
  • Intermittent or constant fault recorded

What to check

  • Read fault memory with a capable Land Rover diagnostic tool; record freeze frame and related codes
  • Visual inspection of sensor, connector, and wiring for damage, corrosion, or contamination
  • Check for recent work near front axle that could have disturbed wiring
  • Verify vehicle battery voltage and engine ground integrity
  • Use DVM or scope to check sensor supply (typically 5 V reference) and ground at the sensor connector
  • Backprobe sensor output and compare to expected values while cycling suspension

Signal parameters

  • Sensor supply/reference: typically 5 V (check vehicle-specific service data)
  • Sensor output: typically 0.5–4.5 V proportional to pressure (varies by sensor)
  • Expected idle/rest output: near low-mid voltage when no load (vehicle-specific)
  • CAN/serial messages: suspension module reports sensor value to other ECUs (check with factory scan tool)
  • Common-fault readings: open = no output / high-impedance; short to 0 V = 0 V; short to 5 V = ~5 V

Diagnostic algorithm

  1. Connect a Land Rover-compatible diagnostic scanner. Clear codes, cycle ignition and see if C1041 returns; note any related codes.
  2. Record live data for front axle piston pressure sensor while operating suspension (raise/lower or cycle pump). Observe for expected changing values.
  3. Visually inspect sensor connector and wiring; unplug connector and inspect pins for corrosion, bent pins or moisture. Repair or clean as needed.
  4. With ignition ON, backprobe the sensor connector: verify 5 V reference and ground presence. If missing, trace and repair supply/ground circuit to suspension control module.
  5. Measure sensor output voltage while cycling suspension. If output is fixed or outside expected range, suspect sensor or internal short.
  6. Check continuity and for shorts between sensor signal, 5 V reference and ground (with battery disconnected for continuity checks). Repair any damaged wiring.
  7. If wiring and power/ground are good but output abnormal, replace the front axle piston pressure sensor and retest.
  8. If fault persists after sensor replacement, test or reflash the suspension control module software and inspect for module faults or body harness issues.
  9. After repairs, clear codes and perform function tests (ride height/suspension cycle) and a road test to confirm the issue is resolved.

Likely causes

  • Corroded connector at the pressure sensor (common on exposed wheel/axle locations)
  • Wiring harness chafed where it passes near suspension components
  • Sensor internal failure (no output or stuck at rail)
  • Lost sensor 5 V reference or ground from suspension control module
  • Mechanical contamination (fluid ingress) causing sensor to fail

Fault status

⚠️ Status
Stored when the suspension control module detects the front axle piston pressure sensor circuit output is implausible, out-of-range, open or shorted. May disable associated suspension functions and illuminate warning indicators. Requires verification of sensor, wiring and control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

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C1039 C1040 C1042 C1406 U0121
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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