Join Date: Jun 2010
Location: San Jose, CA
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If the sensors are missing, the PCM will still read them, but interpret them as an overtemperature condition, ie, the CAT is overheating and/or the DPF is overheating. In that case, it'll shut down the engine and prevent it from starting until the sensor readings return to normal.
The PCM will expect a DPF pressure reading if the sensors are there or not. If it doesn't see something reasonable, it'll supposedly throw a code. Eventually, it'll start a regen after 660 miles or so whether there's a DPF or not and it'll belch white smoke nonstop
'05 F150 5.4L FX4 SCrew
'10 F350 6.4L Lariat FX4 CC SRW LWB
Last edited by aquaman350; 02-25-2013 at 11:26 PM.