Share wideband O2 with ECU?

[NineThrityONE]

Can I simply piggyback from the wideband I already have to the ECU? (no DSMLink yet)

 

[DSMPT]

If your ECU is stock, then no. It can't handle 5v wideband signal. But if your wideband control unit has a 1v narrow band signal output, then yes.

 

[NineThrityONE]

Ok then Ill just put in another o2, will any 4 wire work?

 

[IHeartMyHonda]

Aem wideband can simulate a stock 0-1v o2 sensor. Turn the screw dial on the back until it reads P04 then send the signal from the white wire to the ECU.

If you don't have an aem unit, then I can't help you

 

[steve]

I doubt we tried any old 4 wire sensor but the standard Denso Upstream O2 sensor for a 2.0L DSM works and is about $50.
Even if your WB can simulate a NB, I like to have a real NB O2 doing it's thing switching back and forth @ 14.7:1 to validate that the WB is behaving.

There is at least 1 open 0-5v analog input on most 1G DSM ECUs, that's the input for the EGR Temp sensor used on California cars and unused on the 90-93 cars. But without DSMLink or some customer software the ECU doesn't know what to do with the signal.