Need some help guys. About a month ago I installed a Dynojet wideband. At that time I was running a SCT chip and the wideband showed I was running a tad lean. When the tuner burned the chip, he turned off the o2 sensors and I installed the wideband sensor in the drivers side front stock sensor location. I ran like that for about a month with no trouble codes. Then, it was indicated to me that the pcm needs to read the front o2 sensors and that I should install the wideband sensor in the stock rear location instead, which I did and everything was still fine. Next, I bought a predator so I could have more control and pulled the SCT chip and installed the 93 octane pulley tune. When installing the tune I modified parameters as such: Turned off heater bank 1, turned off heater bank 2, and turned off rear o2's. After about ten minutes I got a "Service Engine Soon". I then reinstalled the tune making sure I made the correct choices, and the light came back on. I was near an Autozone so I stopped in and had them read the code. PO156, which is O2 Sensor Circuit Malfunction (Bank 2 Sensor 2). What am I doing wrong? Is there a way the predator can show what changes were made to a pulley tune to insure the correct choices? Please help, I hate that light.

 

Turn O2's back on and turn off OBD MIL should take care of it. I got the WBC o2 in the drivers rear with it set that way and no check engine light.
jeff

 

Can I do that without reinstalling a tune? Or do I have to go through the whole process again? Does turning off OBD MIL stop all mil codes? If so, that doesn't sound like such a good idea.

 

Go to install custom then go to modify tune.Do not use the reset all parameters but the other option can't remember.The go to OBD and turn obd mil off. This will keep you from getting OBD emmision codes as far as I know but if you should still get a check engine light on everything else just not emmissions like rear O2 and such. hen you will reflash your ecu.
jeff

 

Dude you need to find a new tuner. What kind of fool would turn off the front o2 sensors?

 

Yes. I have eliminated the SCT chip that tuner burned for me and am now trying to tune through the predator. Thanks for the help guys.

 

You need to turn the heaters back on. With them off, the HEGOs aren't getting hot enough to work properly and that's why you are getting the codes.

 

I followed the directions in the predator manual which said: O2 Config = Turn this off for no rear O2 sensors, this tells the PCM that no rear O2 sensors exist, the heater 1 and 2 have to be turned off as well. Sal, what is the correct way for me to do what you said? Do I have to reinstall a tune or can the existing tune be easily modified to just turn the heaters back on? Sorry for the stupid questions, but I just got this thing and I'm still learning how to use it.

 

Just modify that tune.
jeff