P244F: Exhaust Temperature Too High For Particulate Filter Regeneration (Bank 2)

The bank 2 counterpart of P244D: during a filter burn the second bank's exhaust gets hotter than the substrate tolerates. No manufacturer documents P244F publicly. The bank 1 version appears in GM's 2011 Duramax tables as a catalyst overtemperature during regeneration, and Ram links P244D on current Cummins trucks to exhaust temperature sensor faults, so a wrong sensor reading deserves suspicion before the hardware. On a real overheat the usual trigger is surplus fuel on that bank, from a dripping injector or a filter that was allowed to load up far too much before the burn started. The controller ends the regeneration, may reduce power and will retry later. Because overheating can crack the filter, a code that keeps returning should be diagnosed rather than repeatedly cleared. Too little heat on bank 2 is P244E.

Bank 2 is the side without cylinder 1, so it only exists on V or boxer engines.

Symptoms

• Malfunction indicator lamp on
• Regeneration stopped, possibly reduced power

Most likely causes

• Surplus fuel on bank 2 from a leaking injector
• Bank 2 exhaust temperature sensor or wiring reading too high
• Bank 2 filter heavily overloaded before the burn

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the soot load and differential pressure with a scanner
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. Check the differential pressure sensor's hoses
4. Check the temperatures before and after the filter
5. Fix any fuel injection or EGR codes before regenerating
6. Perform a regeneration while driving or at a repair shop when the diagnosis allows it

Good to know

• Repair difficulty: hard
• It can trigger limp mode.
• It affects emissions.

What each character of P244F means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 4: Emissions
• 4F: Specific fault in that system

Frequently asked questions

Can I keep driving with code P244F?

If the light is on steadily, take a highway drive or go to a repair shop soon. If the car is in limp mode or the light is flashing, do not push the engine.

What causes code P244F?

The most common causes are: surplus fuel on bank 2 from a leaking injector; bank 2 exhaust temperature sensor or wiring reading too high; bank 2 filter heavily overloaded before the burn.

Related codes

• P244DExhaust Temperature Too High For Particulate Filter Regeneration (Bank 1)
• P244EExhaust Temperature Too Low For Particulate Filter Regeneration (Bank 2)

Sources

• law.cornell.edu: 13 CCR 1968.2
• gsi.ext.gm.com: 11OBDG11 Engine Diagnostics
• static.nhtsa.gov: MC 11031237 0001

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.