05pnygt

just put a off road h on... turned the rear 02 sensors off was fine first couple times driving.. now it's giving me the dtc about every 3 times i start the car... any ideas of what i can do to keep the light from coming on?

gman73

Do you have a hand held tuner? If so, what are the trouble codes?

05pnygt

Yeah I have xcal 2. It's an oxygen sensor dtc it keeps tripping the code about every 3rd time I start car

howarmat

you have to shut the rear O2s off via the tune. Email your tuner to send a new tune with them off

05pnygt

The code is po155 htd ox s htr cir 2 s1. There's an option on my tuner to turn the rear oxygen sensor off and I do that. But then after a couple of times starting the car it comes back on

Simon1

repeat.

follow intructions above. The tune from the tuner will always work.

J2L06GT

P0155 is the front sensor on driver side, its in the exhaust manifold,
not the rear sensors, you can't turn off the front ones, only adjust
how fast they react if you have long tube headers.

05pnygt

So I guess I'm going to pick up a new front driver side sensor hopefully that will work

Simon1

Ok, beofre you go throwing money at your O2 sensors, try listening to us that have gone thru it. I have had the same codes thrown as you and it was all tune related. You need a custom tune.

If you still beleive the O2 sensor is bad, which I doubt, then just take it out and switch the two O2 sensors side to side. Even then, I still say it's tune related. You may replace the O2 sensor and the code goes away, but it will come back.

05pnygt

ok i will try the custom tune... hope it works...