Hi does anyone know how to do the timing chain calibration?

I have a 2010 mazda 3 2.2 185bhp model..

dpf light flashing with the p1336 code so changed the chain and it's still flashing, changed the cam and crank sensors and it's still flashing, had the service reset, dpf checked and it's fine, oil just changed with the chain so it's not diluted... ran out of things to do now!!! Thinking it must be the chain calibration but there is no where online that says how to do it? Thanks a lot if anyone can help!

 

Take it to Mazda.

 

Its a known fault, once the chain is replaced, it must be recalibrated.