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Home / DTC / B13DF — Rear right - Face temperature sensor

B13DF — Rear right - Face temperature sensor

Detailed page for trouble code B13DF.

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B13DF

LAND ROVER B — Body

Rear right - Face temperature sensor

Brand: LAND ROVER
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Failed/aged temperature sensor (NTC thermistor or similar)
  • Open or short in sensor wiring or connector
  • Corroded or poorly seated connector / water ingress
  • Poor ground or supply voltage issue to sensor circuit
  • Faulty HVAC/climate control module or related wiring harness
  • Incorrect calibration or software fault

Symptoms

  • Rear right climate zone reports wrong temperature or does not track setpoint
  • Uneven cabin temperatures or incorrect face/vent air temperature at rear right
  • HVAC system displays sensor fault or reduced functionality for rear zone
  • Possible repetitive DTC stored or illuminated message in instrument cluster
  • Repeated attempts by system to re-calibrate or cycle blower/vents

What to check

  • Retrieve freeze frame and full diagnostic data from climate/HVAC module and note the B13DF status and any related codes
  • Visually inspect rear right sensor, housing and connector for damage, corrosion or water ingress
  • Wiggle test wiring and connector while monitoring live data to reproduce fault or identify intermittent behavior
  • Check connector pins for continuity, corrosion or bent pins; ensure secure mating
  • Measure supply voltage and ground at the sensor connector (with ignition on) and compare to spec
  • Measure sensor resistance at ambient temperature and while warmed/cooled to verify thermistor behavior

Signal parameters

  • Sensor type: usually NTC thermistor (resistance decreases as temperature increases)
  • Resistance behavior: should change smoothly with temperature (typical range: a few kΩ to tens of kΩ depending on design)
  • Voltage (module side): typically monitored as a low-voltage signal referenced to ground (0–5 V nominal system range) — consult service data
  • Expected behavior: stable, plausible temperature reading in live-data and no rapid jumps
  • Fault indications: open circuit (very high resistance/infinite), short to ground (very low resistance), or intermittent/erratic voltage swings

Diagnostic algorithm

  1. Connect diagnostic scan tool, read and record B13DF and any additional HVAC/climate codes and live data for the rear right face temperature sensor.
  2. Visually inspect sensor location and connector for contamination, water, or mechanical damage. Repair any obvious issues.
  3. With harness exposed, perform a wiggle test while monitoring live-data to look for intermittent changes. Repair/replace harness if intermittent.
  4. Back-probe the sensor connector: measure reference supply and ground with ignition ON; confirm proper voltages per factory spec.
  5. Remove connector and measure sensor resistance at ambient temperature. Heat or cool the sensor slowly (e.g., with warm air) and verify resistance changes smoothly.
  6. If resistance is out of range or does not change correctly, replace the sensor and re-check.
  7. If sensor checks good, verify continuity and check for shorts between sensor, ground and the HVAC module input. Repair wiring as needed.
  8. If wiring and sensor are good, test or swap the HVAC module input (if permissible) or follow manufacturer guidance for module diagnostics.
  9. Clear codes, run system through rear zone climate cycles and monitor live-data to confirm proper operation. Road/test as required and re-check for reappearance of the code.
  10. If recurring and no hardware fault found, check for software updates or consult technical bulletins.

Likely causes

  • Damaged connector at rear right face sensor (pin corrosion or bent pins)
  • Broken wire or chafed harness between sensor and HVAC module
  • Sensor resistance out of specification due to age or contamination
  • Intermittent circuit caused by moisture in connector area
  • Module input stage fault (less common)

Fault status

⚠️ Status
Rear right face temperature sensor circuit fault — implausible or out-of-range signal detected by HVAC module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-1.5 hours

Similar codes

B13D0 B13D1 B13D2 B13D3 B13D4 B13D5
320

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