C1B05

Code

LAND ROVER C — Chassis

Chassis Control Module — Sensor Communication Fault

Brand: LAND ROVER

Type: C — Chassis

Views: UK: 19 EN: 25 RU: 18

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Page language: EN

Causes

Open, shorted or intermittent wiring between sensor and CCM
Corroded, damaged or loose sensor connector
Failed sensor (position, height, acceleration, yaw, wheel speed, etc.)
Power supply or ground fault at the sensor
CAN/LIN bus communication fault or termination issue
Software or calibration fault in the CCM or sensor

Symptoms

Warning lamp or message related to suspension/stability/air ride
Reduced or degraded chassis control functionality (e.g., limp or manual mode)
Uneven ride height or disabled air suspension leveling
ABS/traction/stability warnings if related sensors are affected
Stored or repeating fault code C1B05

What to check

Read and record all stored codes and freeze frame data with a capable scan tool
Check which sensor(s) are referenced by factory fault data or module live data
Visually inspect sensor connectors and harness for corrosion, damage, or water
Wiggle test harness while watching live data for dropouts or erratic values
Verify battery voltage and engine/vehicle grounds are good and clean
Check CAN/LIN bus presence and module addresses on the network

Signal parameters

Sensor supply/reference commonly 5 V (verify with OEM data for model/year)
Position/height sensors typically output 0–5 V or variable resistance
CAN bus idle voltages: CAN High and CAN Low ~2.5 V (dominant and recessive transitions vary; expect differential signalling)
On a two-wire sensor, continuity should be low resistance; check for open/short
Watch live data: sensor should show stable, plausible values and update at expected rate

Diagnostic algorithm

Connect a compatible diagnostic tool, read and save all DTCs, note related modules and freeze frame data.
Identify the specific sensor(s) implicated using factory documentation or module data stream.
Clear the code, perform a road/static test while monitoring live data to confirm code reappears and to observe failing sensor behaviour.
Visually inspect sensor and harness routing for damage, corrosion, water entry and connector security.
With ignition on, backprobe the sensor connector: verify reference voltage, ground continuity and signal voltage against OEM specs.
Perform a wiggle/strain test of the harness while watching live data for intermittent faults.
If sensor communicates over CAN/LIN, verify bus voltage levels and traffic. Use an oscilloscope to inspect message integrity if possible.
Check for proper module presence on network (no other module addressing conflicts) and confirm CCM software/calibration is current per service bulletins.
Repair any wiring/connectors (clean, repair, replace) or replace the sensor if bench/connector tests fail.
After repair or replacement, clear codes, perform relearn/calibration procedures if required, and retest to ensure the fault does not return.

Likely causes

Corroded connector at the affected sensor(s)
Broken or pinched harness where it flexes (suspension or door area)
Sensor failed and not sending valid data
Low battery voltage or poor ground causing intermittent comms
CAN bus wiring short to battery/ground or missing termination resistor

Fault status

⚠️ Status

Chassis Control Module detected lost, invalid or corrupted communication from a chassis sensor. Fault logged when expected sensor message or valid signal was missing or out of range.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

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