What's the difference between P0H P0B and P0A? I figure one is auto trans/vtec 5sp/vtec and non vtec?

Just want to make sure I'm getting the right ECM. Looks like mine has been changed before. But from a 94

 

Ecus have 3 parts to the OEM number.

All accord ECUs start with 37820

Middle:
P0A : 94-95 Accord EX (vtec)
P0B : 94-95 Accord LX/DX (non vtec).

P0H looks like the 96-97 EX ECU.
P0B is used for the 96-97 OBD2 ECU, strange that honda didn't change it to P0H.

The last number deals with the transmission:

A01 is for a manual
A51 is for an automatic

The last digit is different for 96/97 ECU.

The best way to figure out the ecu is to go to a parts site like hondapartsnow.com and look up the ECU that is made for your car.

For your car, the OEM ECU part number should be 37820-P0A-A51
That is for a 94/95 EX automatic.

What ECU is in your car right now?

 

It's correct. P0A A51

Should i buy a remanufactured one from a auto retailer or order from eBay? Local pick n pull only has a bunch of stripped down accords and 96+

 

ECUs are pretty durable. I would look at a site like car-part.com to search junkyards. You can sort by price or by distance.