Code
B141F
LAND ROVER
B — Body
Right rear - Climate seat - Electric thermal device 2 sensor of temperature
Views:
UK: 4
EN: 9
RU: 4
AI status
Completed
Completed
100%
Causes
- Open or short in temperature sensor 2 wiring (broken conductor, short to ground/power)
- Poor connector contact, corrosion, bent/missing pins at seat connector or module
- Failed/degraded temperature sensor (thermistor) in the seat heater pad
- Failed seat control module or harness splice
- Water ingress or mechanical damage to the seat wiring or sensor
- Intermittent faults from chafed wiring when seat is moved or adjusted
Symptoms
- Right rear heated/ventilated seat does not regulate temperature or stops working
- Seat climate system displays a seat sensor fault or warning message
- Inconsistent or implausible temperature readings for the right rear seat in scan tool live data
- Seat heating may operate in a default/safe mode (reduced or disabled)
- Possible intermittent operation when seat is moved or occupants shift
What to check
- Read and record freeze-frame and complete DTC list with a capable Land Rover diagnostic scanner
- Check live data for right rear seat temperature sensors and watch for unstable or out-of-range values
- Visually inspect seat connectors, harness routing, and seat module for damage, corrosion or moisture
- Wiggle-test wiring while monitoring live data to spot intermittent faults
- Backprobe sensor circuit at the seat module to check continuity, supply and ground
- Measure sensor resistance (or voltage) at the sensor and compare to specification in the workshop manual
Signal parameters
- Sensor type: typically an NTC thermistor (resistance changes with temperature) — consult service manual for exact type
- Resistance behaviour: resistance decreases as temperature increases (NTC). Exact ohm values at specific temperatures are manufacturer-specific — consult wiring/service data
- Signal interface: seat temperature sensor typically reports to seat control module as resistance or as a low-voltage signal (0–5 V) after conditioning — check vehicle-specific data
- Expected condition: stable changing value when heated or when ambient temperature changes; no open-circuit (very high resistance) or hard short (very low resistance)
Diagnostic algorithm
- Retrieve full DTC list and freeze-frame data using a Land Rover-capable diagnostic tool. Note any related seat or body control codes.
- Attempt to clear the code and reproduce. If code returns, continue diagnostics.
- Perform a visual inspection of the right rear seat area: connectors, visible wiring, seat adjustment mechanisms, and signs of water ingress or damage.
- Monitor live data for right rear seat temperature sensors (sensor 1 and sensor 2 if present). Observe values while applying heat (hand, warm air) and while moving the seat to detect intermittent changes.
- Isolate the circuit: access the seat sensor connector, unplug and inspect pins for corrosion, damage or foreign material. Reconnect and check if the code clears or changes.
- Measure sensor resistance at the seat sensor with seat disconnected. Compare to manufacturer specification or confirm NTC behaviour by warming/cooling the sensor and observing resistance change.
- Check continuity and insulation of the wiring from the sensor to the seat module; repair any broken or chafed wires. Backprobe at the module to verify expected reference, signal and ground voltages.
- If wiring and sensor test good, test/replace the seat control module or swap with known-good module (if available) per manufacturer procedure.
- After repairs, clear codes and perform functional test and road/usage test to ensure the sensor reading remains stable over time and seat operation is restored.
- Consult the official Land Rover workshop manual/wiring diagrams for exact resistance/voltage values, connector pinouts and any TSBs/repair instructions before part replacement.
Likely causes
- Damaged or disconnected sensor connector at the seat
- Open or short in the sensor harness between seat sensor and seat module
- Failed thermistor/temperature sensor element in the seat cushion
- Corroded pins or poor ground at seat module connector
- Faulty seat control/module (after wiring and sensor verified)
Fault status
Status
Right rear seat climate: Temperature sensor 2 circuit fault detected (open/short/implausible reading) — service recommended.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
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