1999 honda civic obd location. There are two generations of obd ports obd1 and obd ii aka obd2. Graham the only 99 civic engine available in the us is the 16 l so this might not help u but the 16 is the traditional location. Obd connector location for honda civic 6 1996 2000 you will find below several pictures which will help you find your obd connector in your car.
To determine which one you have if your vehicle was built and sold in the us after january 1st 1996 you will have an obd 2 port. The obd ii port is located under the steering wheel. The obd ii socket is located on the passenger side.
Honda accord 1999 location of obd diag chuckie888 1stturn off the ignition and remove the mes connector green thing with 2 wires in the underdash fuse boxand connect your paperclip between the two wires insert one side deep and the otherside loosely 2ndturn ignition on srs light will come on for about 6 seconds then shut off. Go to the obd2. Cannot find where to plug 16 pin diagnostic controller.