forced open loop??

[BDPhoto519]

My 2018 Camaro SS won't stay in open loop for tuning no matter what you try in the tune. I have to manually put it in open loop in the scanner with the special functions while tuning. =(

[bk2life]

Thanks for the info! It is April 2021 and I am still using this thread!

its almost april 2023, and its still good info

[Speedmaster747]

Something internal on 2017 and up e92 ecus, unless commanded by scanner, the ecu reverts to closed loop no matter what. If you happen to have a faulty sensor, like a weak reading one or a bad heater. The trims will go crazy and the vehicle will run like crap. Best scenario is to tune open loop, forced by the scanner, and then unplug the sensors, until you swap for new oem ones

[lbrenneman]

Under fuel > oxygen sensors is where you can force open look.

However the little description text seems counter-intuitive

[ECM] 2529 - O2 Sensor Ready Voltage: If the O2 voltage drops below this value, the O2 Sensor is ready for closed loop. Set low to disable closed loop.

stock value is 1,795


As it reads, if the O2 voltage drops below 1795 the O2 sensor is ready for closed loop. Then it says, set low to disable closed loop?

I use a value of -1795. Closed or open loop?

In all my scans with a negative O2 value, the PID: fuel system status #1 says CL-normal. I assume that means the car is in closed loop?

Thanks for helping a nooob!

Correct...so if you want closed loop disabled, set to a range that its unable to ever drop below

[STAGEUP]

Question is, will we ever be able to run OL on E92As? Ha ha ha ha, the world may never know! Haa! You can always unplug the primary o2s and delete the o2 codes to force OL on 2017s and up E92 ecu vehicles. Just FYI

[Pavetim]

If it's successful forcing OL will the O2 sensors still show voltages in the scanner? From what i understand it will still show voltages but the fuel trims will be 0? My scanner doesnt' have a CL disable, i am having issues with my oxygen sensors know so trying to figure that out, hopefully can just reseat ECU connectors.

[Pavetim]

I would love to find a way to turn off the O2 sensors in my 2019 silverado, i'm chasing my tail back and forth and about ready to give up on this damn thing and MAF tuning should be super easy and i hate when people say oh thats old school, well old school worked for decades and I think my fuel trims are screwing me up. I want to just run plain ol simple WB but i did the same as you guys and mine still says CL yes and O2 sensors still showing active, wonder if you can just unplug them?