While this code indicates a malfunction, the sensor itself enables a known as Automatic Defogging or Climate Control Humidity Sensing . How the Feature Works
: In some models, faults in the misting sensor can prevent the "Stop/Start" system from operating, as the car prioritizes keeping the cabin humidity levels stable. Potential Causes
Specifically, the B13C2-49 code refers to a "Windshield Mist Sensor - Internal Electronic Failure." While it might seem like a minor nuisance, this fault can disable critical convenience features and impact visibility during inclement weather. Understanding the B13C2-49 Fault Code land rover jaguar b13c2-49
Several factors can cause the windshield misting sensor to fail. Based on owner reports and diagnostic data, the primary causes are:
Remove the plastic trim covers behind the rearview mirror. Check for: Loose connectors. Signs of water staining on the headliner or glass. While this code indicates a malfunction, the sensor
When the sub-fault byte is appended to the primary code (B13C2), it explicitly points to an internal electronic failure within the sensor itself. The computer is sending power to the sensor, but the internal silicon microchips are returning garbage data or failing basic startup self-tests. 2. Vehicle Compatibility: Who is Affected?
: Corrosion or loose pins in the wiring harness connected to the sensor. Recommended Solutions Replace the Sensor Understanding the B13C2-49 Fault Code Several factors can
The diagnostic trouble code (DTC) . This sensor, typically tracked under part number LR058011 , measures cabin humidity right against the glass to tell the climate control module when to trigger the air conditioning compressor and clear a foggy windshield. When the "-49" sub-type code flags, the sensor's internal circuitry has completely failed, leaving your vehicle unable to automatically manage interior window fogging.
Very low. It is a "DIY-friendly" fix that involves popping off a plastic trim piece and unplugging the old sensor.
Unlike a -87 sub-code (which indicates a missing communication message or an open LIN bus circuit), the -49 fault indicates that the HVAC module is still communicating with the sensor, but the internal micro-circuitry of the sensor itself has broken down or burned out. In extreme failure scenarios, diagnostic live data streams on tools like JLR SDD or PATHFINDER may read impossible parameters, such as a windscreen temperature locked at a default value of . Core Causes of Fault Code B13C2-49
The sensor is typically located on the windshield, housed within a small black casing behind the rearview mirror. It constantly measures the humidity level on the inside of the windshield.