code 335 still shows up after clearing them all

[sgreuel]

10/94 SHO ATX
I have cleared all of the codes both by unhooking the battery for several hours and by pulling jumper wire during KOEO test. And code 335 still shows up as soon as I test the codes again. This is all with a new DPFE sensor plugged in and hooked to hoses.

I was geting 335 code before I cleared them along with 172 and 173 after the separator code.

I'm not sure what to do next.

Thank you, Steve

 

[sgreuel]

I went and warmed it up with the new DPFE on it and CEL (Check Engine) came on almost constant now. Read the codes and it shows the same:
335
(1)
111

 

[rubydist]

I suspect you got a bad dpfe. several others have reported high failure rates in these new parts recently.