Soot Sensors and Dpf

[blackpup]

Greasytshirt was explaining how the ecu could not properly control worn or failing injectors, increasing soot build up in the DPF. I was wondering if failing soot sensors might be a failure point as well?



jimmy

 

[greasytshirt]

Hey there blackpup. There's something funky with your link, might want to double check that.

Soot sensors? Trucks with DPF have temperature sensors and differential pressure sensors. The differential pressure sensor tubes can get clogged with soot. SOA for working on trucks with these sensors is to disconnect the tubes from the sensor then blowing the tubes out with compressed air (don't blow compressed air into the sensor or it will fail).

Measurements of differential pressure (pressure before and after the DPF) are used in a calculation to decide when a regen is needed. As the amount of trapped soot builds up, the pressure differential also goes up.

 

[blackpup]

Hey there blackpup. There's something funky with your link, might want to double check that.

Soot sensors? Trucks with DPF have temperature sensors and differential pressure sensors. The differential pressure sensor tubes can get clogged with soot. SOA for working on trucks with these sensors is to disconnect the tubes from the sensor then blowing the tubes out with compressed air (don't blow compressed air into the sensor or it will fail).

Measurements of differential pressure (pressure before and after the DPF) are used in a calculation to decide when a regen is needed. As the amount of trapped soot builds up, the pressure differential also goes up.

My link posting skills have atrophied from lack of use