What does P244B mean?
The pressure drop across the DPF is too high, which usually means the filter is heavily loaded with soot or ash.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Check engine light
- Reduced power
- Frequent regens
Common causes
- Overloaded DPF (soot or ash)
- Failed regenerations
- Faulty sensor
How to diagnose P244B
- Check soot load and regen history.
- Check the sensor and hoses.
- Try a forced regen if allowed.
How to fix it
- Forced regen
- DPF cleaning
- Replace sensor
Estimated repair cost
Likely repairs for P244B run from about $100 to $900, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Forced DPF regeneration (scan tool) | $100 - $300 |
| DPF off-vehicle cleaning | $300 - $900 |
| DPF differential pressure sensor | $150 - $500 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P244B?
High severity
Limit driving. A very loaded DPF can crack during a regen.
P244B FAQ
What does P244B mean?
P244B stands for "Diesel Particulate Filter Differential Pressure Too High (Bank 1)". The pressure drop across the DPF is too high, which usually means the filter is heavily loaded with soot or ash.
Can I drive with a P244B code?
Limit driving. A very loaded DPF can crack during a regen.
How much does it cost to fix P244B?
It depends on the cause. The likely repairs for P244B range from about $100 to $900 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P244B?
The most common causes are: overloaded DPF (soot or ash); failed regenerations; faulty sensor.