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How can I contact Johan. I need to shut my rear o2 off bc my car is running like crap and I dont have a car now. I had the old crom with the option to shut off the old o2 but the updated version that had to download 9.29 does not have this option. So if anyone can help please I need it.
Thanks
 

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How can I contact Johan. I need to shut my rear o2 off bc my car is running like crap and I dont have a car now. I had the old crom with the option to shut off the old o2 but the updated version that had to download 9.29 does not have this option. So if anyone can help please I need it.
Thanks
your rear o2 sensors don't come into play with how your truck runs. it's the fronts that do. the rear o2s are used for emissions testing.
 
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