Quote:
Originally Posted by Jpf86
Thanks for your reply! I agree that it’s normal for STFT to move around quite a bit under throttle, but it deviates so much that it triggers P0171 and puts traction control on until I clear the code. I’d say that’s definitely not normal, but if it’s not unhealthy then maybe I’ll just have to live with clearing codes every time I drive. It does only happen when I very quickly engage the throttle.
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Ah yes, the code... definitely odd. I would blame the tune for missing some small detail, but I would have they have gone over that by now. Maybe shoot for one more revision out of them and see if it solves the issue? I had a weird problem myself for a while that triggered P0171 along with a couple other C-codes (very similar setup to yours). For me, the solution was the tuner updating RaceROM on his end, as mine was up to date. Otherwise we spent a bunch of time trying to find the problem, but couldn't. No codes any longer, so I would bet it's just something funky with the tune. The 2017+ cars have some hiccups from what I've read with the more updated software and tunes.