B13EB

Code

LAND ROVER B — Body

Right rear - Face - Duct air temperature sensor

Brand: LAND ROVER

Type: B — Body

Views: UK: 12 EN: 19 RU: 18

AI status

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Page language: EN

Causes

Open or shorted sensor wiring or connector
Corroded, loose or contaminated connector pins
Failed right‑rear face/duct air temperature sensor (thermistor)
Water ingress or physical damage to the sensor or duct assembly
Faulty HVAC control module or poor ground at module

Symptoms

Incorrect right‑rear zone temperature or inaccurate temperature reading on climate display
Automatic climate control for rear/right zone not regulating properly
HVAC system runs constantly or fails to reach setpoint in that zone
Stored HVAC module fault code(s); usually no engine MIL but climate control fault indication may be shown

What to check

Read and record all HVAC/comfort system fault codes with a diagnostic scanner
Visually inspect right‑rear face/duct sensor and connector for damage, corrosion or water ingress
Check harness routing for chafing, pinched sections or recent body repairs
Backprobe connector with ignition on to measure sensor signal/voltage and reference ground
Measure sensor resistance at sensor connector with sensor removed (follow safe ambient temperature handling)

Signal parameters

Sensor type: typically an NTC thermistor (resistance decreases as temperature rises)
Typical resistance (example reference): ~10 kΩ at 25°C — actual spec varies by model, consult manufacturer data
Module signal voltage range: ~0.5–4.5 V signal to HVAC module (varies by vehicle)
Expected behavior: gradual resistance change with temperature; no open (>100 kΩ) or short (

Diagnostic algorithm

Connect scan tool, confirm B13EB and note freeze frame/related HVAC codes. Clear code and reproduce if possible.
Visually inspect sensor and connector for damage, moisture, corrosion or foreign objects in the duct area.
With ignition ON, backprobe sensor connector: verify reference supply/ground to connector (where applicable) and measure sensor voltage. Compare to expected smooth change when warming/cooling sensor (by hand/air).
With sensor disconnected, measure harness continuity to HVAC control module pins and check for short to ground/power. Wiggle harness while monitoring for intermittent changes.
Remove sensor and measure its resistance at known ambient temperature. Compare to manufacturer specification or expected NTC response. If resistance is open/short or out of expected range, replace sensor.
If sensor and wiring check good, test HVAC control module input circuit and module grounds. Replace or reprogram module only after wiring and sensor faults are ruled out.
After repair, erase codes and perform functional test of climate control and monitor live data to confirm sensor reports correct temperature values and code does not return.

Likely causes

Broken or chafed harness between sensor and HVAC module
Pin corrosion or pushed‑out terminal at sensor connector
Sensor element failed (out of spec resistance/thermistor open)
Connector contaminated by moisture/debris causing intermittent readings

Fault status

⚠️ Status

Right rear face/duct air temperature sensor circuit fault

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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B13EB — Right rear - Face - Duct air temperature sensor