B13E3

Code

LAND ROVER B — Body

Front right - Face - air duct temperature sensor

Brand: LAND ROVER

Type: B — Body

Views: UK: 11 EN: 26 RU: 17

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Page language: EN

Causes

Faulty front-right face/air-duct temperature sensor
Open or short in sensor wiring (connector, harness, splice)
Corroded/poor connector or pins (water ingress)
HVAC climate control module internal fault or software error
Incorrect sensor replacement (wrong type/spec)
Contamination or blockage at sensor (dirt, moisture)

Symptoms

HVAC not maintaining expected cabin temperature on passenger/right side
Uneven cabin temperature between left and right vents
Diagnostic trouble code B13E3 stored in HVAC module
HVAC system running in default or reduced function mode
Incorrect temperature readings reported by climate control (if displayed)

What to check

Read stored freeze-frame and scan for related HVAC codes
Visually inspect sensor location and wiring harness for damage, kinks, chafing, or water entry
Check connector pins for corrosion, bent pins, or loose terminals
Backprobe sensor connector and measure signal voltage/ground while changing vent temperature or ambient conditions
Measure sensor resistance at the connector with sensor disconnected and compare to expected value (see signal_params)
Wiggle wiring and connectors while monitoring the signal to check for intermittent fault

Signal parameters

Typical NTC thermistor behaviour (example values; confirm vehicle spec): ~2 kΩ to 10 kΩ at ~25°C (ambient)
Open-circuit: very high resistance (>>100 kΩ) — indicates open wire or failed sensor
Short-circuit: near 0–50 Ω — indicates short to ground or internal short in sensor
Voltage on sensor signal line (to HVAC ECU) typically in the range ~0.3–4.7 V depending on ambient temperature and circuitry (verify with vehicle-specific manual)

Diagnostic algorithm

Connect a vehicle scan tool, read B13E3 and any related HVAC DTCs, record freeze-frame data
Visually inspect sensor and harness at the front-right face/air duct for damage or contamination; repair any obvious issues
With ignition ON, backprobe sensor connector and measure signal voltage at rest; compare to expected voltage range
Disconnect sensor and measure its resistance at known temperatures (room temp ~25°C) and compare against expected NTC curve from vehicle data; replace sensor if out of tolerance
If resistance and connector are good, perform continuity checks from sensor connector to HVAC module harness to identify opens or shorts; repair wiring as required
If wiring and sensor pass, check HVAC module grounds and supply voltages; if all inputs OK and problem persists, consider module software update or module replacement after verifying manufacturer guidance
Clear codes and perform a functional test (run HVAC, change vent temperatures) to confirm code does not return; monitor sensor signal during test
Document repairs and retest after road/idle cycle to ensure fault has cleared

Likely causes

Damaged wiring or connector leading to the front-right face temperature sensor
Failed thermistor inside the temperature sensor
Corroded connector due to water ingress
Aftermarket or incorrect replacement sensor with wrong resistance curve

Fault status

⚠️ Status

HVAC module detected implausible/open/shorted signal from front-right face/air-duct temperature sensor. System may default to fallback behavior for cabin temperature control.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5 - 2.0 hours

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B13E3 — Front right - Face - air duct temperature sensor