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OBD2a or OBD2b

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Old 07-22-2004, 11:13 AM
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Default OBD2a or OBD2b
I have two ECUs, I believe an 00' civic dx which should be OBD2b....

Heres a link to a thred with pics of the ECUs, I need to knoe which one of the ECUs is OBD2a and which is OBD2b.....also which should i be running in my car.

https://www.homemadeturbo.com/forum/...threadid=24472
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Old 07-22-2004, 11:24 AM
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Default Re:OBD2a or OBD2b
there should be a year stamped on them.

96-98 = "a"
99+ = "b"
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Old 07-22-2004, 11:43 AM
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Default Re:OBD2a or OBD2b
Man, you got my hopes up, I cant find a stamp anywhere....

I can't find these codes on google either...
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Old 07-22-2004, 12:12 PM
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Default Re:OBD2a or OBD2b
try cracking the ecu open and looking for dates/markings.
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Old 07-22-2004, 12:13 PM
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Default Re:OBD2a or OBD2b
Good call, Ill check it out...
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Old 07-26-2004, 08:29 AM
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Default Re:OBD2a or OBD2b
well?
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Old 07-26-2004, 10:48 AM
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Default Re:OBD2a or OBD2b
he musta cracked it open like u would an egg
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Old 07-26-2004, 05:39 PM
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Default Re:OBD2a or OBD2b
Sorry guys....it was an older ECU....problem is now fixed. You guys are awesome
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