What about used DPFs? Do Used DPFs work? Theoretically, they should not work, however, in practice I do hear of people using them.

Ideally, they should be professionally cleaned before fitting. So why not just clean your existing old unit?

All cars and trucks log each litre of fuel injected into the cylinders for the life of the vehicle. The vehicle’s ECU then uses an algorithm to convert litres of fuel infected to grams of soot trapped in the DPF.

Then it uses the number of regenerations done to calculate soot to ash content . It then calculates the amount of ash to backpressure.

Then it compares this theoretical result to the actual reading from the pressure differential sensor. If they are too different then it will throw a fault code and turn on the check engine light DPF light. Eventually, it will shut the vehicle down to limp mode.

When you fit a new DPF you reset the calculations (data) back to zero or Day One. A second-hand DPF may be half full. However… You cannot reset the algorithm to half…. So the theoretical and actual pressure reading will be way way way out!

FOR ALL YOUR DPF QUERIES, top service and DELIVERY EVERYWHERE – CALL 1300821877 | enquiries@dpfsales.com.au https://www.dpfaustralia.com.au

Charles Anderson

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