Replacing the sensor is a straightforward DIY task if the plastic cover is accessible. For most Evoque and Discovery Sport models:
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.
: Toggling the "Auto" climate control mode will fail to clear the glass effectively, forcing you to manually blast the front defroster button. Primary Causes of the Failure land rover jaguar b13c2-49
Yes, but the screen may overheat and shut down. In extreme cases, module damage can occur. Short trips are fine; long road trips in summer are risky.
The windshield misting sensor is designed to detect humidity levels on the inside of the windshield. When the sensor detects a high risk of fogging, it sends a signal to the HVAC module to activate the air conditioning (for dehumidification) and direct air toward the windshield, even if the driver has not manually enabled the defroster. Symptoms of a B13C2-49 Error Replacing the sensor is a straightforward DIY task
Before replacing hardware, check the module’s software version. Using JLR SDD or a dealer-level tool, update the ACM/TSDM to the latest calibration. The update modifies the self-test tolerance, allowing for slightly higher internal temperature thresholds and fan speed tolerances. This resolves false positives.
In some cases, the A/C compressor may struggle to maintain set humidity levels, or the climate control system may exhibit erratic behavior. When the "-49" sub-type code flags, the sensor's
: Optimizes the use of the AC compressor; the system only runs "dehumidification" when necessary rather than being on constantly. Common Issues