21/09/2026
⚠ DPF LIGHT ON ? CAR IN LIMP MODE ?
NEED A DPF REGEN? COME SEE US 💯🖒
Why does my Diesel Particulate Filter (DPF) block ? ANSWERED 🖒
Every vehicle type & engine combination can have differing reasons as to why the filter blocks.
The rate of particulates generated by the engine, the quality of the fuel, quality of the or oil, driving style, even the
location of the DPF in the exhaust system can all contribute to the filter blocking or not regenerating fully.
Generally, the problems arise in around town stop start driving where the regeneration process might not complete. A warning light will illuminate or a message indicating the DPF is full displays on the dash. If you continue to drive in the same manner, the soot build up will increase until other warning lights illuminate and the vehicle will go into ‘limp’ mode, where driving speed is restricted.
This warning stage will now involve a visit to the mechanic to carry out a forced regeneration on the filter, where filters that cannot be regenerated will then cost you between £500 to £1000 just to replace the filter.
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