DPF question

The DOC is on top of the DPF filter correct? I just had that and the DPF baked 3 weeks ago

 

The DOC is before the DPF. Meaning DPF is closer to final exhaust outlet. The DPF inlet and outlet sensors (#2 and #3) sometimes are the same part#. The DOC inlet sensor (#1) would be a different part #. Like HeavyD said your #1 and #2 may have been mixed up and screwed into the wrong ports. They could not get plugged into the module wrong because the plugs are different.

 

Ok I'm going to look in the morning.. the # 1 and 2 sensors that may be mixed up are they towards the top of exhaust or bottom? There's a sensor on top.. DOC ..DPF and at bottom of inlet.. also 2 hard lines running up to a module.. which sensors should I be tracking down? thanks for the help

 

The hard tubes are for the pressure sensor. The temp sensors are the ones with wires.

 

The bottom 2 sensor wires were in the wrong ports

 

I switched the 2 sensors truck did a self regen while on the highway and DPF light went away..

 

Glad it worked out. Don't forget about cleaning/replacing that doser. You have to maintain these aftertreatment systems just like anything else that requires it..........or you will be visiting me in my shop sooner than later.