Hondata

Hello,

I have a 2009 Civic Si Sedan with flash pro, running FPM version 1.4.5. I have been running my own MAP based tune (before the hybrid ones came out, so I just stuck with what was working) with no issues what so ever.

I read a post on here from Hondata suggestion that the hybrid tunes be used for street tunes instead (I'm not sure why, but I figured i'd play around with it and see what was different). My mods are below

AEM CAI V2
PLM Header (...)
Q300 Exhaust

and I created a new hybrid tune, told it to use the MAP tables for fueling and copied my ignition and fuel maps over (paying attention to the indexes and correcting them when they were different so that everything was basically identical).

After a few minutes of driving on the hybrid tune, my afr would just lock to stoich and never change. I'll attach a datalog showing what I'm talking about (with the extra stuff cut out). When I go back to my MAP tune, I have no issues like this, so it's an issue with the other tune.

Any clues?

-Jonathan

You're getting an error code - P0134, which indicates a fault with the o2 sensor heater. The race calibrations disable this error, which is why you're not getting in on that calibration.

Thanks for the input. Didn't notice the error code since it didn't throw a CEL.

So my O2 sensor is shot? I have ~80k miles. Also, the O2 sensor had to be extended to fit into the PLM header.

Time to buy a new one? It seems to read accurately on the MAP cal lol, no strange spikes, no unusually smooth input, responds quickly, etc.

-Jonathan