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Home / DTC / P050E — Engine exhaust temperature during cold start too high low

P050E — Engine exhaust temperature during cold start too high low

Detailed page for trouble code P050E.

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P050E

LAND ROVER P — Powertrain

Engine exhaust temperature during cold start too high low

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
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Page language: EN

Causes

  • Faulty or degraded EGT (exhaust gas temperature) sensor
  • Damaged, corroded or disconnected EGT sensor connector or wiring (open, short to ground or to supply)
  • Poor sensor ground or ECU connector issues
  • Exhaust leak, restriction, damaged turbo or DPF causing abnormal temperatures
  • Contaminated sensor (soot/oil) or sensor mounted incorrectly
  • Incorrect ECM/PCM calibration, software bug or intermittent ECU input failure

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Diagnostic trouble code P050E stored
  • Abnormal engine behavior during cold start (rich/lean, hesitation or increased smoke)
  • Extended warm-up time, possible poor idle until warmed
  • Possible reduced performance or forced limp mode in severe cases
  • DPF regeneration issues or earlier-than-expected regen events

What to check

  • Read and record freeze-frame and stored data with a capable scan tool (confirm cold-start conditions)
  • Check for other stored codes (especially temperature and sensor-related codes)
  • Perform visual inspection of the EGT sensor, harness and connector for heat damage, corrosion or contamination
  • Inspect the exhaust system for leaks, restrictions, damaged turbocharger or DPF issues
  • Back-probe sensor connector and measure signal while cold-starting (see signal parameters)
  • Check connector pins for good contact and proper sealing; wiggle harness to reproduce fault

Signal parameters

  • EGT sensors are often thermocouples (mV output) or thermistors; expected raw signal usually a small voltage that rises with temperature.
  • Typical thermocouple outputs: low millivolts at ambient/cold (near 0–20 mV) rising with temperature (hundreds of mV at high EGT). ECU may scale to 0–5 V in some systems — consult OEM data.
  • During cold start expected EGT: relatively low (commonly well under 200 °C). A reading indicating very high temperature during cold start or near-ambient/no rise when a rise is expected will set the code.
  • Sensor circuit resistance (if thermistor type) and exact voltages vary by model — use Land Rover factory values where available.

Diagnostic algorithm

  1. Connect a diagnostic scanner, read all codes and note freeze-frame data (engine coolant temp, intake temp, RPM, fuel trims, DPF status).
  2. Perform visual inspection: check EGT sensor location, wiring for heat damage, chafing, melted insulation, connector corrosion, and secure mounting.
  3. With ignition on (engine off) and then during cold start, back-probe the sensor connector and record signal voltage/millivolt output and reference/ground continuity. Compare to expected behavior (signal should move with exhaust temperature).
  4. Check sensor ground and ECU connector pins for good continuity to chassis/ECU. Repair any poor grounds or bad contacts.
  5. If the sensor is a thermistor type, measure resistance at ambient and compare to specification. If a thermocouple, measure mV output while the exhaust warms up.
  6. Inspect exhaust path for leaks near the sensor, turbocharger functionality, and DPF condition (blocked DPF can raise EGT). Repair any exhaust or turbo issues before replacing sensor.
  7. If wiring and exhaust are good but signal is out of range, replace the EGT sensor and retest.
  8. If a new sensor shows same fault, perform continuity and short-to-power/ground checks between sensor connector and ECU. If harness is OK, suspect ECU input stage — consult factory diagnostics before replacing ECU.
  9. Clear codes and perform multiple cold-start cycles to confirm repair; check for any related stored codes or TSB remedies.

Likely causes

  • Internal failure of the EGT sensor (thermocouple or thermistor out of spec)
  • Wiring harness damage near the exhaust (heat-related insulation failure)
  • Corroded connector pins causing unreliable signal
  • Exhaust restriction (DPF blockage) raising EGT during cold start
  • Open/short to ECU on the sensor input or poor reference/ground

Fault status

⚠️ Status
EGT sensor reading during cold start out of expected range (too high or too low) — P050E
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-2 hours

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320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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