St205 CEL issues, Random CEL Diagnostic not working Options

[CDUB]

Okay start off the car is a94 st205 jap import with light mods. now my issue is that the Check Engine Light is illuminating after a few minutes of driving the car but i believe it shouldn't be flashing like it is and should come on permanently till the fault it fixed or the ecu is reset? My light will flash a random number of times then go off for a random period of time.(will flash once a second between 2-10times then go off for a random period of time)

Also, i know how to read the codes by bridgeing te1 and e1 in the diagnostics port but when i turn the ign to "on" the cel comes on then off after about 3 seconds like a normal start up.

The car is not acting any different with the light on or off as compared to the last 30XXXkm I've driven it.

The CEL only started happening since it got very cold here.

Anyone have insight on to why the CEL is flashing and not coming on permanently or why I am unable to retrieve codes.

I've tried just resetting the ecu a few times now but this issue is still around

If it helps i can get a video of the dash while I'm driving if anyone thinks it will help.

[Jeebus]

It was 54.

I reset the ECU, and a couple weeks later it popped up again. The intercooler level had dropped a little bit from the cap, so I topped it up and reset the ECU again.

Unfortunately my clutch blew out before the New Year, so I haven't been driving for a bit to see if this error code pops up again. Perhaps it was a faulty sensor, maybe my radiator is starting to leak (no stains under the car), but I won't know for sure until I get the car moving again to see whether the error code pops up again.