are these codes from the same source(problem)?

[paulha]

I have a 1994 ex XLT 4.0 and all of a sudden my check engine shows up after running for a few min. So I run get code reader and this is what I got
KOEO: 335

Mem: 157,327,332,336

KOER: 325,536,11,46

I seems to run good and the codes talk about low or high voltages, and I have no clue where to look, I did clean the MAF sensor. but nothing changed. Are these all connected in some way and where do I start? I'm 72 and on oxygen so any help or advice would sure be gratefully appreciated, btw this is my only transportation so I sure need to get it running. Thank you so much in advance

 

[gmanpaint]

Those are mostly EGR codes. The DPFE sensors and silicone vac lines for it are known to fail over time. If that doesn't fix it, then EVR solenoid is also suspect.

You can test for voltage on these before buying new parts, if you have a multi meter. I found a decent thread with some good info for you to read on this subject.

Click the link below:

335 and 565 codes -93 Cali explorer