95 ATX unusual KOEO codes

[Jan Fiuczek]

Hello everyone, could you guys help me with interpreting EEC codes?
My engine suddenly started running roughly, it's sound changed and a huge vibration appeared - it behaves like only 5 cylinders work.
I did both KOEO and KOER tests, and KOEO gave me incomprehensible codes; the sequence was: 1 1 1 6 6 3 6.
111 is for system pass, but what about another numbers? 2gens have 3-digit codes, is it possible that it somehow gave me two 2-digit codes? There is no code 66 or 36 in our list, but on some Stang forum I found that code 66 stands for:
MAF below minimum test voltage.
What about the 36 code? What to do with this surprise?

KOER gave me 336 and 632 codes
336 means DPFE sensor, I'm gonna check EGR nostrils again (I cleaned nostrils few months ago...) and the whole EGR, anyway this case is kinda clear for me.
632 stands for overdrive button, I pushed it while testing and I'm sure it works, so don't know what's going on with this code, but nvm, I think it's not really important for now.

I've also done a cylinder balance test, check engine flashed 3 times, so I'm gonna verify 3rd cylinder spark plug and wire. Is there anything more I can do on my own with this problem?

I own the only one 2 gen SHO in Poland so I can't count for anyone locally, mechanics here know almost nothing about these cars...
I hope you understood everything, thanks.

 

[SHOdded]

You are counting the flashes then to get the codes? Since a code reader, however accurate, WOULD give you the correct number of digits at least. Interesting that KEOR gave you 3 digit codes no issue. Maybe check the battery, see if it is having problems. Could be voltage to the PCM is affected in KOEO mode.

How many kms/miles on your SHO? When was the last time you performed a 60K/100K service?

 

[rubydist]

post a little video of the flashes, and we will decipher it for you.

 

[BaySHO Performance]

The 336 points to a voltage problem with the DPFE. Cleaning nostrils won't do anything. Get a new sensor. I use the Duralast SU243 from Autozone for ATX. Which would be fine if you live in the US. Rock Auto ships world wide:

https://www.rockauto.com/en/catalog...sion,egr+pressure+feedback+(dpfe)+sensor,5088

However, a malfunctioning EGR system wouldn't cause the engine to run rough. I suggest rechecking the codes. If none point to an ignition problem, go after plugs, wires, vacuum leaks and a dirty MAF.