P244A DPF differential pressure too low (bank 1)
P244A means the pressure difference before and after the DPF is lower than it should be - as if the filter were not restricting the gas at all. The cause can be cracked or melted ceramic, a removed filter or disconnected sensor pipes. We check the pipes first: if the ceramic is intact, the filter can be kept.
Does restoration help?
Not worth restoring
If the ceramic is cracked or melted - no: cleaning removes deposits but does not repair cracks. However, a disconnected or damaged pressure pipe or sensor can trigger the same code, so we check those first. If the filter is intact, it does not need replacing.
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
- Check Engine or DPF light on.
- Soot at the tailpipe - the filter no longer traps it.
- The roadworthiness test measures particles on diesel cars up to 3.5 t first registered from 2013; since 2026 a car with a damaged filter fails.
Most common causes
- A disconnected or cracked pressure sensor pipe.
- Cracked or melted filter ceramic.
- The filter has been removed.
- A faulty differential pressure sensor.
Order of checks
What to do
- 1
Pipes and sensor
We check whether the pressure sensor pipes are disconnected or cracked, and we check the sensor signal.
- 2
Filter condition
We check that the filter is in place and that the ceramic has no cracks or melted areas.
- 3
New filter or replacement part
If the ceramic is damaged, we recommend a new filter or a replacement part. We do not offer filter removal - without a filter the car fails the roadworthiness test.
FAQ
Questions about P244A
This is established during diagnostics: first the pipes and the sensor signal are checked, then the filter itself. Soot at the tailpipe shows that the filter no longer traps it.
It can, if a pipe was left disconnected or cracked after the filter was removed and refitted. That is why the connections and fault codes must be checked after refitting.
P244A
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
