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P codes are useless for BMWs. Stick with Bimmerlink or better.
Not an S63 expert, so take what I say with a grain of salt. Hopefully an N63 expert can chime in.
Post cat O2 codes won't do anything but cause you to fail emissions testing if you have it. They don't change how the engine operate, they only tell you whether your cats are working or if your sensor is broken. So don't worry about anything negative happening to the engine.
What brand sensor are you using? I've heard that a lot of BMWs are very sensitive to brand and I believe that OE is Bosch.
Last edited by jbash87; 02-06-2024 at 06:17 PM..
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