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Home / DTC / P244E — Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 2

P244E — Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 2

Detailed page for trouble code P244E.

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Code

P244E

Generic P — Powertrain

Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 2

Brand: Generic
Type: P — Powertrain
Views: UK: 22 EN: 25 RU: 20
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Page language: EN

Causes

  • Faulty exhaust gas temperature (EGT) sensor on Bank 2
  • Open/short or poor connection in EGT sensor wiring or connector
  • Failed EGT sensor heater (if equipped)
  • Intake air leaks or turbocharger underboost reducing combustion temperature
  • Excessive EGR flow or EGR stuck open cooling exhaust gases
  • Fuel system problems (low injection quantity, faulty injectors) causing low combustion temperature

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • DPF regeneration fails to start or is aborted
  • Increased soot accumulation and reduced DPF cleaning events
  • Reduced engine power or limp mode on some vehicles
  • Poor fuel economy and increased emissions
  • Freeze frame or logged data showing EGT lower than expected during regen request

What to check

  • Read stored freeze frame and live data for EGT Bank 2 during a regen request
  • Visual inspection of EGT sensor(s), wiring harness and connector for damage, corrosion or disconnection
  • Check for related codes (boost, EGR, fuel injectors) that can explain low exhaust temperatures
  • Verify vehicle history: recent DPF events, driving conditions, or failed regen attempts
  • Inspect for exhaust leaks upstream of the EGT sensor
  • Verify turbocharger and boost system for leaks or actuator faults

Signal parameters

  • EGT (exhaust gas temperature) Bank 2 — expected regen temperature typically ~550–700 °C (vehicle specific); logged value shows below regen threshold
  • EGT sensor voltage/resistance — thermistor/thermocouple expected range per manufacturer (example thermocouple: mV proportional to temp; thermistor: resistance falls with rising temp)
  • Sensor heater circuit status (if equipped) — voltage present when heater commanded (typically battery voltage)
  • ECM regen request status — command active/idle
  • Related sensors: boost pressure (bar), intake air temperature (°C), fuel rail pressure (bar)

Diagnostic algorithm

  1. Capture freeze frame and full DTC list; note conditions when P244E set (engine load, speed, coolant temp, ambient)
  2. Check live data: request a forced or active regeneration (if safe/allowed) and monitor EGT Bank 2. Confirm whether temperature rises or remains low
  3. Perform a visual inspection of the EGT sensor and connector on Bank 2. Look for melted wiring, corrosion, contamination or loose pins
  4. Backprobe sensor connector with ignition on/engine running: measure sensor output (voltage or mV) and compare to expected values at ambient and during warm-up. For thermocouples, check mV response to applied heat (infrared gun)
  5. If equipped with sensor heater, command heater on and verify heater supply voltage and ground and that heater draws expected current
  6. Check wiring continuity/resistance and for short to ground or battery. Wiggle test while monitoring live data to reproduce intermittent faults
  7. Inspect exhaust for leaks upstream of the sensor (smoke test or visual). Repair leaks and re-test
  8. Check turbocharger operation and boost system for leaks or actuator faults that reduce exhaust temperature. Repair as needed
  9. Check EGR system operation; verify EGR valve closes during regen attempts. Clean or repair EGR if sticking open
  10. Verify fuel delivery and injector performance (balance, pressure) if combustion temperature is suspected low
  11. If sensor and wiring check good, review ECM software/updates and compare against manufacturer technical service bulletins (TSBs)
  12. After repairs, clear codes and perform a monitored regeneration; confirm EGT rises and no recurrence of P244E

Likely causes

  • Bad or intermittent EGT sensor or sensor heater on Bank 2
  • Wiring or connector fault to the EGT sensor
  • Turbocharger or boost control fault reducing exhaust temperature
  • Excessive EGR flow or stuck EGR cooler causing cooled exhaust gases

Fault status

⚠️ Status
Exhaust temperature on Bank 2 is below the threshold required for DPF regeneration.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

P244D P2002 P2458 P2195
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