ok i was searching the web the other day and came apone a site that said that the pr4 ecu with a code (what they called it) of A02 is an obd 1 ecu not an obd 0 ecu. is this true? the ecu that i have reads PR4-A02 and came from a 90 integra LS. any insite on this would be great. Thanks

 

If it comes from a 90 integra then it's obd-0
-92-93 integras came as obd 1

I tried to search for the code after the PR4 but can't find anything on A02 but I'll guess it's going to be obd 0 as they didn't make obd 1 integras in 1990

 

A PR4 ecu with A02 at the end(37820-PR4-A02) comes from a 1990 Integra. It is 0BD0.