Cel P0139

[alsaez]

P0139 O2 sensor circuit slow response (Bank 1 sensor 2)
I was able to get rid of it with my Cobb ap. just wondering what to do if it comes back constanly.
Im taking my car to do a pro tune at a local cobb dealer. Will they be able to get rid of it forever?

Mods: short shifter, su mm, aem cai, turbosmart bov(vent to atmosphere), 3" corksport catback with cpe downpipe(no cats), upgraded turbo manifold and tmic, gt3071r turbo(recently installed), 1step colder denso spark plugs, oil catch can,
next mod: maxflo fuel pump internals

 

[COBB Tuning]

My bet is that you have a faulty 02 sensor and these are not cheap to replace. I believe they are around $200 from the dealer as it looks like the rear O2 sensor and not the front. I believe you should be able to turn that code off. If it is the front O2 sensor, the wideband, it is a $400 fix. Make sure which sensor has gone bad and replace it.

Travis
COBB Tuning

 

[Blendercloud]

My bet is that you have a faulty 02 sensor and these are not cheap to replace. I believe they are around $200 from the dealer as it looks like the rear O2 sensor and not the front. I believe you should be able to turn that code off. If it is the front O2 sensor, the wideband, it is a $400 fix. Make sure which sensor has gone bad and replace it.

Travis
COBB Tuning

Seeing Cobb customers get support by Cobb Tuning on a non-Cobb forum is outstanding. Solidifies my choice of which ECU-mod I'm going with.

 

[LBV]

That code is a common code when you don't have a cat in the DP that sits before the 2nd O2 sensor.

I fixed mine by welding in a hi-flow cat into my DP but outside of doing the diode trick to fool the sensor or extending the O2 wires past the 2nd cat there's not much you can do.