Hondata

When using any wideband it should be wired to D10. Using D10 requires the romoval of r136 and r138 on the board. Using D14 limits the upper and lower voltage so you won't see full range. Removing those resistors on D10 will give you full range. The only issue I have seen on the Xseries is the ...

catsman50 wrote: Mon Jun 16, 2025 11:39 am By no means a tuner but have same exact setup without issues. Aem x to d14, stock b16a2 in a ek sedan. Hondata seems to read up to 16.4-16.6 afr. Is the wire connected into the jumper harness?

which jumper harness are you referring too? do you have a picture of your closed loop settings?

After lots of reading

it seems No AEM X series wideband works with S300, regardless of the timeout feature set to max. It simply isn't read the same 0-5v scale it's looking for

It appears the second the closed loop freezes and stop swinging, the code sets shortly after.

https://www.hondata.com ...

I'm not sure i can catch it in a datalog, as its at random at any point into a 15 minute datalog

here is the calibrations both used:

tune

and p30 b16 tester setup for wideband only as a sanity check

bumping this to see if anyone found a solution, i am dealing with the same.

Hello all,

I have been chasing a random 02a oxygen sensor code (1) since I've started my P28 s300 journey on a stock B16A2.

This code sets about every 5 to 10 miles and puts the car back in open loop. Up until the point the code is thrown, closed loop in my opinion reacts and tunes perfectly ...