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hi all, ok so i swapped an obd2a y8 into my 99hx but i think i ended up buying the engine harness off a obd2a ex sedan, so there’s no second o2 connector on the harness, as the obd2a sedans i believe had the second connector where they put them all later, under the body.

so before i wire in a new connector, i’m just curious if anyone knows if honda left the second connector(for production cost reasons) tucked under the center console or anything on the 99-00hx’s

any info is much appreciated as id rather not pin the new sensor or have to buy a whole obd2a ex engine harness
 

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have you checked out the differences between OBD2a and OBD2b as far as ecu pinouts?

Also worth checking out that chassis connector plug that is near the ecu.
 

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OBD2b (99-00) ex is the one that does not have the second O2 on engine harness
 
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