P244E Exhaust Temperature Too Low For Particulate Filter Regeneration (Bank 2)

P244E only exists on engines that have a separate particulate filter for the second cylinder bank, which is rare. No manufacturer documents this code publicly; it mirrors P244C, so the logic described for bank 1 applies here. GM, for example, counts regenerations on its 2017 diesels that end early because the heat-up never reached a stable phase, and gives that bank 1 fault a Type A rating. CARB requires diesel systems to detect a regeneration that fails to complete. On a two-filter layout the second bank lacks heat when its oxidation catalyst no longer converts the fuel, its exhaust temperature sensor reads low or the gas cools through a leak. Comparing both banks during a forced regeneration with a scan tool is the most direct check. Overheating of bank 2 is P244F.

Likely causes

Symptoms

• Malfunction indicator lamp on
• Filter warning, regeneration does not complete

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: law.cornell.edu, gsi.ext.gm.com.