How do i know if the motor is primed/ready for testing?

Before an OBD test or auto diagnostics can be done, most of the emission control system monitors have to complete their checks of the emission control equipment. Depending on the age of your vehicle, if one or two monitors have not yet completed their checks, the vehicle is not ready for an OBD test. If this happens, you will need to drive your vehicle further to allow these monitors to finish testing the equipment. The amount and type of driving needed varies according to the vehicle.

http://www.engine-codes.com/p3400.html

Your best bet is going to take it to the dealer or a local independent repair shop that has a good reputation !

Check the MAP sensor for accuracy as they can trigger a EGR code .

You may need to replace the ECM

Have an OBII scan done. (fault scan) Autozone, Advance, etc.. do this for free and will give you list of fault(s) that triggered light. They'll also reset light for you - FREE

soumds like the computer went crazy, ive run into this with dodge/crysler. what you do is remove the battery cable (neg side) for 5 mins, then reconnect and drive car for 50 miles with a complete cool down, meaning drive 25 miles park overnite then drive another 25 miles then have the retest done it should pass, hope this helps.

In my experience with the 2.7L engine, the spark plugs are located on the top of the engine below the individual ignition coils. The coils are placed between the intake manifold and the valve covers, 3 per side. The coils are held in with "torx" screws. Simply remove the screws, and disconnect the connectors to remove the coils. The spark plugs will be underneath. Be sure to properly gap the spark plugs for maximum life and emissions compliance. Also, an improperly gapped plug can shorten the life of the coil packs.
Hope this helps!

Your emission sensors seem to be just a 'spec' out of normal (I would not call them defective!), but it could also be tainted fuel. Just to pass test I would buy the gas treatment at your local auto parts specifically for emission testing. Ask them at the counter. It will get you passed.

Under the hood, there is a fuse block. I believe it is on the driver's side of your vehicle. Open that box, and pull the "ECU" fuse. Leave the fuse out for at least 5 minutes. Put the fuse back in, start the car, and let it idle for at least another 5 minutes. Do not drive the car, touch the gas, or even look at the gas pedal for these 5 minutes, as the ECU is remapping itself. This will properly reset the ecu and clear the codes. After this you may drive the car.

fill your muffler with SOS pads just before your test a wire coat hanger can remove them after the fact..
good luck its how i got my prelude to pass inspection in vancouver bc canada