What are the common causes of P244C?

Low bank 1 exhaust temperature preventing regeneration. A failed bank 1 EGT sensor reading low. A thermostat stuck open keeping engine temperature down. Short trip driving that never heats the bank 1 exhaust.

Read bank 1 exhaust gas temperature on a scan tool. Check engine coolant temperature for a stuck open thermostat. Verify the bank 1 EGT sensor against a known reading. Run the engine under load to reach regeneration temperature. Replace the bank 1 EGT sensor or thermostat as found. Clear the code and retest.

P244C

Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1

System: Auxiliary emission controls (P code)
Lamp: Check Engine Light
Category: Powertrain - Auxiliary Emissions Controls

What it means

P244C means Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1.

Check these first

Low bank 1 exhaust temperature preventing regeneration
A failed bank 1 EGT sensor reading low
A thermostat stuck open keeping engine temperature down
Short trip driving that never heats the bank 1 exhaust

What to do next

Read bank 1 exhaust gas temperature on a scan tool
Check engine coolant temperature for a stuck open thermostat
Verify the bank 1 EGT sensor against a known reading
Run the engine under load to reach regeneration temperature
Replace the bank 1 EGT sensor or thermostat as found
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.