C1B13

Code

LAND ROVER C — Chassis

Chassis control module — manufacturer-specific fault (C1B13)

Brand: LAND ROVER

Type: C — Chassis

Views: UK: 18 EN: 22 RU: 16

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Page language: EN

Causes

Intermittent or low power supply / poor battery voltage
Corroded, loose or damaged ground
Damaged connector or wiring to the chassis control module
Loss of CAN or vehicle network communications
Faulty wheel speed, yaw rate or steering angle sensor feeding the module
Module internal hardware or firmware fault

Symptoms

ABS / DSC / traction control warning lamp illuminated
Loss or intermittent operation of stability/traction control functions
Diagnostic scanner reports C1B13 in chassis control module
Possible degraded braking or stability intervention behaviour
Other modules reporting COMM/CONTROLLER faults or network faults

What to check

Read all stored and pending DTCs from all modules with a manufacturer-level scanner
Check battery state-of-charge and measure system voltage (key on / engine running)
Visually inspect fuses, relays and module connector for corrosion, water, bent pins
Verify the chassis module is present and communicating on the CAN network
Check for any recent module programming or battery replacement events
Inspect wiring harness along chassis rails and near suspension/sensors

Signal parameters

CAN bus: presence of CAN High/Low differential messages and voltage levels
Module supply voltage (approx. 12V battery voltage, wake/sleep levels)
Module ground continuity and low ground resistance (
Wheel speed sensor signal frequency or AC amplitude (VR) or Hall sensor voltage/pulse
Yaw rate and lateral acceleration message values (raw and plausibility)
Steering angle sensor counts and plausibility messages

Diagnostic algorithm

Use a manufacturer-level diagnostic tool (Pathfinder/JLR SDD or equivalent) and record C1B13 plus any other codes and freeze-frame data.
Confirm ability to communicate with the chassis control module. Note any COMM errors or timeouts.
Check battery voltage (engine off and cranking) and ensure stable supply; recharge or load-test battery if low.
Inspect module connectors, pins and harness for corrosion, moisture, damage or poor mating. Repair as needed.
Verify fuses/relays for module power circuits. Replace any suspect components.
Probe CAN High/Low at the module connector with a scope or multimeter; verify proper voltage levels and healthy message activity. Repair wiring faults.
Scan and test related sensors (wheel speed, yaw, steering angle). Confirm sensor signals are present and within expected ranges at speed or when rotated free.
If wiring, power and sensor signals are good, check module software/calibration level against manufacturer data. Re-flash or update module software if an available service release addresses the fault.
Clear codes and perform function checks and a road test to verify the fault does not return.
If the fault persists after all above checks and known-good communications/power are confirmed, consider replacing the chassis control module and perform required programming and calibrations. Retest and verify repairs.

Likely causes

Battery voltage was low during a module update or vehicle start
Connector contamination or bent pins at the module or sensor
Broken CAN high/low wires or short to battery/ground
Faulty sensor (wheel speed, yaw, steering angle) producing invalid data
Software corruption or mismatched calibration level in module
Aftermarket accessory or recent repair disturbed wiring or grounds

Fault status

⚠️ Status

Manufacturer-specific chassis control module fault (C1B13) detected. Module reports an internal or network-related error — further diagnosis required.

🔴 Repair difficulty: Hard

⏱️ Diagnostic time: 1.5-3.5 hours

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