Excessive DPF Differential Pressure
The MAXXFORCE-P244B (MaxxForce) diesel fault code means: Excessive DPF Differential Pressure. This is a serious severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- advanced
- Estimated cost
- $400-$2,800
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Common Symptoms
- CEL
- Derate
- No regen completion
Probable Causes (Ranked by Likelihood)
- Plugged DPF Very Likely
- Leaking delta-P hose Possible
Step-by-Step Diagnostic Procedure
Measure delta-P with MD tool.
Inspect pressure lines for soot / kinks.
Remove DPF for cleaning or bake.
Frequently Asked Questions
What is P244B on a MaxxForce 7 (6.4L)?
P244B on a MaxxForce 7 (6.4L) (2007-2013) indicates: Excessive DPF Differential Pressure. This is a known fault code on the MaxxForce engine family and typically points to the causes listed above.
Can I drive with P244B on my MaxxForce?
Only drive short distances to reach a repair facility. Continued operation may cause further damage or progressive derate.
How much does it cost to fix MaxxForce P244B?
Repair cost is typically $400-$2,800 depending on the underlying cause and shop rate. Many MaxxForce faults (especially EGR cooler, head bolt, and VGT repairs) are major expenses that drove fleet owners to repower with Cummins or retire these trucks early.
P244B on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: