O2 sensor question tuners

[edwinm3]

Is it possible for O2 sensors to not work properly and not throw a code?

[BPMSport]

Originally Posted by edwinm3

Is it possible for O2 sensors to not work properly and not throw a code?

Ususally not over time, unless the file programmed in is masking faults or has other unscrupulous changes.

I (hope) and don't think that any tuners would do this.

[edwinm3]

Thanks for the reply, I'm troubleshooting my 08, it has a bit of hesitation when I step on it on high gears and low RPMs. Threw a code the other day for the gas pedal and went into limp mode. I cleared the code and hasn't came back but hesitation still there. Have you seen these go bad?
BTW car has new plugs and clean air filter.

[BPMSport]

First flash back to stock and see if it's still there.

[edwinm3]

Originally Posted by Mike Benvo

First flash back to stock and see if it's still there.

good idea, does it make a difference that I'm catless?

[BPMSport]

Originally Posted by edwinm3

good idea, does it make a difference that I'm catless?

Don't think so

[edwinm3]

Originally Posted by Mike Benvo

Don't think so

great! Thanks Mr. Benvo

[edwinm3]

Ok here is an update, I flashed it back to stock, ran it a few miles and it still doing the same. Didnt get a check eng light but had 4 codes showing (Scanned with INPA)
2B05
2B06
2B07
2726
I have no idea what these codes are

[NikB316]

FWIW I've gone through 1 or 2 o2 sensors and a code has always come on for them.

[BPMSport]

2B05 - Pedal-position sensor 1
2B06 - Pedal-position sensor 2
2B07 - Pedal-position sensor, plausibility
2726 - Oxygen sensor, plausibility before cat., bank 1

My suggestion to you:
1. Check plug and wiring harness on PWG pedal travel sensor and at DME
2. Replace accelerator pedal module

Clear faults. If the o2 error returns, replace that sensor.

Then you should be all good to go

[edwinm3]

Originally Posted by Mike Benvo

2B05 - Pedal-position sensor 1
2B06 - Pedal-position sensor 2
2B07 - Pedal-position sensor, plausibility
2726 - Oxygen sensor, plausibility before cat., bank 1

My suggestion to you:
1. Check plug and wiring harness on PWG pedal travel sensor and at DME
2. Replace accelerator pedal module

Clear faults. If the o2 error returns, replace that sensor.

Then you should be all good to go

Mike I did check last night with bmwlogger s/w and noticed the tps breaking up. What I did was swapped the pedal with wife's 335, clear pedal adaptations and car runs great, feels like it gained 40whp lol. Thanks a lot for your help. Tomorrow I'm ordering a new pedal. 335 one works good but location of the Allen bolt is off

[BPMSport]

Originally Posted by edwinm3

Mike I did check last night with bmwlogger s/w and noticed the tps breaking up. What I did was swapped the pedal with wife's 335, clear pedal adaptations and car runs great, feels like it gained 40whp lol. Thanks a lot for your help. Tomorrow I'm ordering a new pedal. 335 one works good but location of the Allen bolt is off

Good idea!!

Does switching that add the turbos too? Maybe that's the 40 hp you're feeling

[edwinm3]

Originally Posted by Mike Benvo

Good idea!!

Does switching that add the turbos too? Maybe that's the 40 hp you're feeling

Lmao, didnt mean it like that, I think car hasn't been running good for so long that now that it is it feels that way lol