P244B DPF differential pressure too high (bank 1)
P244B means the pressure difference before and after the DPF is higher than it should be - the filter is restricting the exhaust gas. It is usually clogged with soot or ash, often after interrupted regenerations. If the ceramic is intact and the cause has been fixed, the filter can usually be restored rather than replaced.
Does restoration help?
Most likely restorable
Often yes. If the filter is clogged with soot or ash and the ceramic is intact, professional cleaning can restore the flow - ash does not burn off during regeneration. Before cleaning we check the sensor and pipes and fix the cause of the clogging; a measurement before and after confirms the result.
A code shows where to look, but it is not a final diagnosis. We make the decision at the workshop after diagnostics and measurement.
Symptoms
- DPF or Check Engine light on.
- Reduced power, limp mode, higher fuel consumption.
- Regeneration does not complete, especially on short trips in town.
Most common causes
- Soot and ash in the filter - ash does not burn off during regeneration.
- Interrupted regenerations, for example from driving only short distances.
- Injector or EGR problems - the engine produces more soot.
- A faulty pressure sensor or a blocked pipe.
Order of checks
What to do
- 1
Sensor and pipes
We check the differential pressure sensor and its pipes - a wrong signal can look like a clogged filter.
- 2
Forced regeneration
If the filter holds mainly soot, we try a forced regeneration with diagnostic equipment.
- 3
Cleaning and measurement
If regeneration does not help or there is ash in the filter, we remove it and clean it in an OTOMATIC machine. We check the flow before and after.
FAQ
Questions about P244B
If the filter holds mainly soot, a forced regeneration can help. Ash does not burn off during regeneration - if there is a lot of it, the filter has to be removed and cleaned.
That depends on whether a sensor check and a regeneration are enough or the filter needs cleaning. If it does, DPF cleaning for a passenger car costs 120 € (excl. VAT, price list on the "DPF cleaning" page); we confirm the final price after diagnostics. For comparison: a new DPF can cost 700-1700 € or more.
P244B
Not sure what is wrong with your car?
Tick the symptoms or enter the fault code - in 30 seconds you get a first assessment of whether the part can be restored. If restoring is no longer worth it, we buy the old converter.
Request
Book a check or a job
Leave your contact details - we will get back to you, clarify the situation and agree on a time.
- Phone+371 29 007 007
- Phone+371 28 777 998
- WhatsApp+371 20 099 444
- Emailinfo@autokatalizatori.lv
- AddressJūrkalnes iela 62, A7 bokss, Rīga
