B13E1

Code

LAND ROVER B — Body

Right rear - Foot temperature sensor

Brand: LAND ROVER

Type: B — Body

Views: UK: 14 EN: 25 RU: 20

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Page language: EN

Causes

Damaged or disconnected sensor wiring harness or connector (open, short to ground or battery, corroded pins)
Failed footwell temperature sensor (thermistor)
Water ingress or corrosion at sensor or connector
Poor ground or supply fault to HVAC sensor circuit
HVAC control module input fault or internal failure
Aftermarket components or recent interior work disturbed wiring or connector

Symptoms

HVAC climate control displays incorrect rear/foot temperature or unable to regulate footwell temperature
DTC B13E1 stored and may illuminate HVAC warning or message in cluster
Rear foot vent temperature does not change with vent settings or temperature commands
Intermittent operation or loss of rear zone temperature control
Possible other HVAC sensors showing implausible readings if wiring common

What to check

Read and record stored DTCs and freeze frame/live data with a compatible scan tool
Visual inspection of right-rear foot temperature sensor, its connector and wiring for damage, corrosion or water
Back-probe sensor connector and verify reference supply voltage and ground at key positions with ignition on (consult service data)
Monitor live sensor value while changing cabin temperature or warming/cooling the sensor area
Measure sensor resistance at ambient (engine off) and compare to vehicle-specific specification or temperature-resistance table
Wiggle harness and connector while observing live data to detect intermittent faults

Signal parameters

Signal type: temperature sensor (thermistor/NTC) measured by HVAC control module via voltage divider or resistance reading
Typical interface: 0–5 V signal to module or variable resistance (thermistor) — exact method is vehicle-specific
Expected behavior: resistance changes with temperature (decreases as temperature rises for NTC); live-data temperature should move when sensor is warmed/cooled
Refer to factory service data for exact resistance vs temperature table and terminal identification

Diagnostic algorithm

Connect scan tool, read DTC B13E1 and any related codes; record freeze-frame and live sensor values.
Visually inspect the right-rear foot temperature sensor and harness for damage, pin corrosion, water ingress and proper seating of the connector.
With ignition ON (engine off), back-probe the sensor connector. Verify reference voltage/supply and ground presence at the connector pins per service data.
Measure the sensor resistance at ambient (remove connector if required) and compare to the manufacturer’s temperature-resistance spec. Heat or cool the sensor (e.g., with warm air or ice spray) and confirm the resistance changes accordingly.
Wiggle the wiring harness and connector while monitoring live-data to check for intermittent opens/shorts.
If supply and ground are correct but sensor resistance is out-of-spec or does not change with temperature, replace the sensor and re-test.
If sensor checks good, trace/repair wiring between sensor and HVAC control module, checking continuity and insulation to chassis and battery.
If wiring and sensor are good, inspect HVAC control module connectors and grounds; consider module diagnosis or replacement per factory procedures.
Clear codes and verify repair by cycling HVAC functions and rechecking live data and road/operational test.

Likely causes

Connector corrosion or bent pins at right-rear foot temperature sensor
Broken/shorted wiring between sensor and HVAC control module (chafing, pinched)
Faulty temperature sensor (NTC/thermistor out of spec)
Poor ground or blown fuse affecting sensor circuit

Fault status

⚠️ Status

Right-rear foot temperature sensor circuit fault detected (open/short/implausible signal). HVAC control module has stored diagnostic trouble code B13E1.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-1.5 hours

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B13E1 — Right rear - Foot temperature sensor