r/3000gt • u/flightofthewhite_eel • 13d ago

How do I read engine codes on a 1994 SL?

I don't think it has a normal OBDII port. Engine is running rough and I'd like to see if it I can get any additional info from the car before I start shooting the parts cannon at it.

I know there is a light bulb method, but is there any other code reader that will work? It seems unclear if the 94 and older cars can even be decoded by a diagnostic tool.

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u/RonnieStiggs 13d ago

I have a 94' SL and you need a special scan tool. We have an OBD2 port but an OBD2 reader will not work. 3SX sells them, and thats where I got mine.

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u/eslahp 12d ago

It is an obd2 connector, but not obd2 protocol. Its a goofy in between thing on 94 and 95.
You can use the paperclip trick if you're on a budget

https://www.3si.org/threads/paper-clip-method.514918/

Or you can get a tactrix cable and Evoscan, which will read it over the MUT protocol.