While a sensor may be "easy" to replace ... Depending on where the engineers decided to put it/them ... It will take a computer hooked up to it with the appropriate software to figure out which one is the "problem child" ... Or all of them could just be changed!
But, what if it's not the sensor that's actually at fault ... Maybe a wire connector is bad? Or the computer goes on permanent vacation? Or the sensors are RIGHT and the DPF is actually FULL!
Regen on the vehicles don't get it perfectly "clean" ... There is an ultra fine ash that it does not get burnt out, and that builds up ... On my big truck engines, we send them back to Kenworth to clean them ... Not sure if the little tractor ones are "cleanable" or if it's a replacement ... Be interesting what happens with the above M62 ...
