Blog

Fault code P244B means particulate filter differential pressure too high. The measured exhaust back-pressure is above the threshold: typically the filter is clogged.

Typical symptoms

• Marked loss of power
• DPF and engine lights on
• High exhaust temperatures
• Limp mode

Most common causes

• DPF clogged with soot or ash
• Sensor pipes blocked by soot
• Differential sensor out of calibration
• Collapsed catalytic converter upstream

How it is checked in diagnosis

• Measuring the actual back-pressure
• Cleaning or replacing the sensor pipes
• Assessing the ash load: soot burns off, ash does not

Can you drive with code P244B?

Only to reach the workshop: high back-pressure strains the turbo and the engine.

How MasterTuning helps

We read the real values from the ECU, not just the code: that is the difference between identifying the component responsible and replacing parts by trial and error. After the repair we clear the fault and check that it does not come back. Centres throughout Italy.

Read more: vehicle database · what is ECU remapping · find an installer

Do you have code P244B on your car? Book a diagnosis at your nearest MasterTuning centre.

Frequently asked questions

What does fault code P244B mean?

Code P244B means particulate filter differential pressure too high. The measured exhaust back-pressure is above the threshold: typically the filter is clogged.

Can you drive with fault P244B?

Only to reach the workshop: high back-pressure strains the turbo and the engine.

Is clearing code P244B enough to fix it?

No: if the cause is still present the code comes back after a few kilometres. Clearing should only be done after the repair, with the diagnostic tool.

How much does it cost to fix code P244B?

It depends on the component responsible: the diagnosis is precisely what identifies it with real measurements, avoiding unnecessary replacements that cost far more than the correct repair.