Going to be running a Neptune chipped P28 on my setup (2000 ITR), does the P28 look for the secondary O2? Can it be disabled in Neptune? Basically I ended up ripping the secondary O2 sensor wiring when I was removing my cat/exhaust, and need to know if I should bother rewiring it up. I cant even get the O2 out of the cat anyway since its stripped and dont really want to buy another if I wont need it.

 

wont look for it, only obd2 ecus

 

wont look for it

 

OBD1 ECUs = 1 O2
OBD2 ECUs = 2 O2

 

P28 is obd1 which reads off of one 4 wire o2 sensor just like all other obd1 ecu from Honda

 

another vote for no

 

no