B13E0

Code

LAND ROVER B — Body

Left rear - Foot temperature sensor

Brand: LAND ROVER

Type: B — Body

Views: UK: 23 EN: 30 RU: 25

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Page language: EN

Causes

Open or short in the left rear foot temperature sensor circuit
Failed/aged temperature sensor (thermistor)
Corroded, loose, or contaminated sensor connector
Damaged wiring harness (chafing, water ingress, broken conductor)
Poor ground or reference voltage to the sensor
HVAC/climate control module internal fault or software/calibration error

Symptoms

Incorrect or uneven temperature at left rear footwell (cold/hot zone)
HVAC zoning not maintaining set temperature for left rear foot area
DTC stored and possible related HVAC warning or reduced functionality
Possible intermittent behavior (works sometimes, fails at others)

What to check

Use a diagnostic scanner to read DTC B13E0 and any related freeze-frame data
Visually inspect the left rear foot sensor, harness, and connector for damage, corrosion, or water
Wiggle test connector/wiring while monitoring live data to reproduce the fault
Measure sensor connector resistance/voltage with connector disconnected and key on (compare to expected thermistor behavior)
Check continuity and for shorts to ground or supply between sensor and control module
Inspect and test the HVAC/body control module grounds and reference supply voltages

Signal parameters

Sensor type: typically an NTC thermistor (resistance falls as temperature rises)
Typical thermistor resistance range (example): roughly 2–20 kΩ across normal cabin temps (model dependent)
Signal voltage to module: typically 0.5–4.5 V depending on sensor temperature and module circuitry (varies by model)
Reference supply commonly 5 V or pull-up inside the module; ground continuity required
Expected behavior: smooth resistance/voltage change with temperature; open = infinite/very high resistance, short = near 0 Ω or 0 V

Diagnostic algorithm

Connect a compatible diagnostic scanner, confirm B13E0 is current or historic, and view live sensor data and freeze-frame if available.
Perform a visual inspection of the left rear foot temperature sensor and connector for contamination, corrosion, water ingress, or physical damage.
With ignition on and scanner monitoring live data, gently wiggle the sensor connector/wiring to check for intermittent changes or code set.
Disconnect the sensor connector and measure sensor resistance across the thermistor pins; compare to vehicle-specific specification or verify NTC behavior by warming/cooling the sensor and observing resistance change.
With connector disconnected, back-probe the harness at the connector and check for proper reference voltage and ground at the harness side (module supply).
Perform continuity checks between the sensor connector and the HVAC/body control module for open circuits or short to ground/supply.
If wiring and connector are good but sensor readings are out of spec, replace the left rear foot temperature sensor and retest.
If new sensor shows same fault, inspect or test the HVAC/body control module inputs and grounds; check for software updates or stored internal faults. Consider module replacement only after confirming wiring and sensor integrity.
After repairs, clear codes and road/bench test to confirm the code does not return and that temperature control is restored.

Likely causes

Connector corroded or not fully seated at the left rear foot sensor
Wiring damage between sensor and HVAC/body control module (water, rubbing)
Sensor element (thermistor) failed or out of specification
Intermittent connection due to movement — returns with vibration

Fault status

⚠️ Status

Left rear foot temperature sensor circuit fault — open/short/out-of-range detected.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-1.5 hours

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B13E0 — Left rear - Foot temperature sensor