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.

[CDUB]

Well turns out my intercooler was slightly low, topped it up and properly bled it this time and CEL is gone and no trace of it in over a week now.

Noticed the connection between the CEL comming on at the same time the IC pump would start up. It must of been sucking the coolant down below the sensor, then coolant would slosh around intermittently closing the sensor.

For anyone else having this issue I would check the IC coolant level it will look full but when the pump comes on it actually sucks down quite a bit.

This post has been edited by CDUB: Nov 27, 2010 - 2:57 PM

[black13]

Mine comes on as well in colder than -15c or so weather after a couple min of driving but it constantly stays on till car is re-started.

Well turns out my intercooler was slightly low, topped it up and properly bled it this time and CEL is gone and no trace of it in over a week now.

Noticed the connection between the CEL comming on at the same time the IC pump would start up. It must of been sucking the coolant down below the sensor, then coolant would slosh around intermittently closing the sensor.

For anyone else having this issue I would check the IC coolant level it will look full but when the pump comes on it actually sucks down quite a bit.

Do you check the level when the engine is running then? and did you use the pink coolant stuff from Toyota?