[Alpha X]

Okay well for the past few months my Evo's SES light has been coming on and off.

Its to do with my front O2 sensor. Before I got my HFC, and DP it never came on and never had a problem with it. I have paid for numerous tunes and it still comes back.

My A/F Ratio gets all the way down to 10.0 under WOT. Is the tune too rich? Help guys

http://www.youtube.com/watch?v=n-p10nUDI44&feature=youtu.be

If I have to replace the front 02 sensor so be it but how could it go bad with the DP and HFC being installed? The moment I drove it away from the shop it came on.

Note: I made this same post over at EvoM but I wanted you guys to have a look and help me out as well

 

[irmerm]

it's probably the sensor. a buddy of mine was having similar issues with a code for the O2 sensor and gas mileage that was much worse than the usual shitty mileage he gets. Since he has a test pipe and the rear O2 sensor monitor disabled, we just ended up swapping the front and rear sensors. The wiring harnesses are different lengths and we had to swap the grommets, but it seemed like a better solution than shelling out the $$ for a new front sensor.

 

[Alpha X]

it's probably the sensor. a buddy of mine was having similar issues with a code for the O2 sensor and gas mileage that was much worse than the usual shitty mileage he gets. Since he has a test pipe and the rear O2 sensor monitor disabled, we just ended up swapping the front and rear sensors. The wiring harnesses are different lengths and we had to swap the grommets, but it seemed like a better solution than shelling out the $$ for a new front sensor.

Yea I'm just gonna order a new O2 Sensor and see if that fixes the problem. I found a Walker 02 Sensor NEW for really cheap. I just want this SES nightmare to be over with :wallbash:

 

[Inprogress]

Yea I'm just gonna order a new O2 Sensor and see if that fixes the problem. I found a Walker 02 Sensor NEW for really cheap. I just want this SES nightmare to be over with :wallbash:

Did you end up buying the walker o2 sensor? Any issues?