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What is the difference between OBD2A and OBD2B?

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Old 03-13-2005, 06:13 PM   #1
treysawyers
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Default What is the difference between OBD2A and OBD2B?

I have a 98 honda civic DX, and i have a 2000 acura B18b1 LS engine i want to swap in and i need an ecu. Can someone tell me the differences in OBD2 A & B so i know which one i can use. Most likely im going to use the engine harness that is already in the car. but i also have the Engine harness from the LS as well. Can i use a 96-99 ecu on my engine? or do i have to get a 2000-2001?
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Old 03-13-2005, 07:12 PM   #2
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OBD2B
• 2000-2001 Acura Integra
• 1999-2000 Honda Civic
• 1998-2002 Honda Accord

OBD2A
• 1996-1999 Acura Integra
• 1996-1998 Honda Civic
• 1996-2001 Honda Prelude
• 1996-1997 Honda Accord
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Old 03-13-2005, 07:34 PM   #3
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They have different plug designs.
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Old 03-14-2005, 10:24 AM   #4
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IS the plug designs different on the engine itself or is it different under the dash board?
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Old 03-14-2005, 01:26 PM   #5
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Quote:
Originally Posted by treysawyers
IS the plug designs different on the engine itself or is it different under the dash board?
Where the harness plugs into you ecu its dfferent. The ecu is found in the passenger side corner of the car. the design of an OBD2A has a plug, a blank space, a plug and a plug. OBD2B has a plug, a plug, a plug, and a blank space.
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Old 05-20-2008, 03:56 PM   #6
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bump an old thread, i know the design is diff. but im running a 00Y8 motor with a 96Y8 ECU and engine harness. it doesnt feel as strong as my old motor and jerks violently at times and runs funny. like its choking for air or something. would like to know the difference between the two and if i could use my 96 ecu plugs and just plug it into a 99-00 ecu. thnks. you know me. noob all day!
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Old 05-20-2008, 10:09 PM   #7
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dont forget..the 99-00 HX's are obd2A also..on my d series turbo i had to buy a obd2a->obd1 harness
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Old 05-21-2008, 04:31 PM   #8
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anyone else?
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