Land Rover Jaguar B13c2-49 _top_ Official
49: This specific sub-fault modifier indicates an "Internal Electronic Failure."
A: No, it is a manufacturing defect (unless you caused water damage by cutting the roof or installing non-approved electronics). If you are within the new vehicle warranty (4 years/50,000 miles) or CPO warranty, this repair is free.
: Your climate control unit or air conditioning compressor may overcompensate or underperform because it cannot evaluate the moisture profile inside the cabin. Principal Causes of B13C2-49
Jaguar Land Rover (JLR) Affected Models: Range Rover (L405), Range Rover Sport (L494/L462), Discovery 5 (L462), Velar (L560), Jaguar F-Pace (X761), XE (X760), XF (X260) Module: Air Suspension Control Module / Ride Level Control Module DTC Code: B13C2-49 Fault Type: Internal Electronic Failure (DTC ISO/SAE controlled - "Internal electronic failure")
Moisture Intrusion: If there is a microscopic leak in the windshield seal or if high humidity consistently gets behind the trim cover, the sensor’s internal circuitry can corrode. land rover jaguar b13c2-49
The fails to activate when moisture is present.
Modern JLR vehicles (like the Range Rover Sport, Evoque, Discovery, or Jaguar F-Pace) are smart. Very smart. There is a pressure-sensitive mat embedded in the passenger seat. This mat detects:
Verify the LIN bus (communication line) and power supply to the sensor. Use a multimeter to check for shorts or open circuits, as these can mimic an internal sensor failure.
: A loose, corroded, or damaged LIN bus circuit connection between the sensor and the Automatic Temperature Control (ATC) module. 49: This specific sub-fault modifier indicates an "Internal
: The internal circuitry of the humidity sensor has failed. This is the most common cause for the "-49" sub-code.
At its core, the diagnostic trouble code (DTC) is defined by Jaguar Land Rover (JLR) as "Windshield Misting Sensor - Internal Electronic Failure." It is a manufacturer-specific code, meaning its meaning is unique to JLR vehicles and isn't the same as a standardized OBD-II code you might find on other makes.
Technicians at JLR dealerships see this code frequently. After thousands of repair orders, three primary root causes have emerged. Note that replacing the battery will almost never fix this code, despite what some forum posts claim.
Code B13C2-49 means the car’s main computer has tried to communicate with the central touchscreen or infotainment brain, but the screen’s own internal processor has reported an error. It is essentially a "blue screen of death" equivalent for your vehicle’s center console. Principal Causes of B13C2-49 Jaguar Land Rover (JLR)
: This is the most frequent solution. You can find detailed walkthroughs for replacing the sensor on community forums like Drive2.
If moisture has entered the cowl area, the wiring harness or the "E-box" connectors may require cleaning or pin replacement. removal instructions for a specific model like the Range Rover or Jaguar XF?
Remove the plastic shroud behind your rearview mirror. Ensure the sensor is firmly pressed against the glass. If it is hanging loose, it cannot read humidity correctly.
| Part Number | Brand | Description | | :--- | :--- | :--- | | | Land Rover | This is often cited as the primary OEM (Original Equipment Manufacturer) part number for the misting/humidity sensor. | | LR025888 | Land Rover | Another OEM number for the same sensor, sometimes used for earlier models or different trims. | | BJ32-18D693-BA | Land Rover (Late) | The official Land Rover part number for later production models. | | C2D21168 | Jaguar (Cross-Reference) | Jaguar's OEM number for the same sensor. As noted in owner forums, parts from the sister brand are often cheaper and identical. |
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