Hello, currently working on ford focus, 2013, 2.0L direct injection. Im having p2196 fault- running rich. I checked for air, vacuum leaks- everything seems okay. Tried to change o2 sensor- no luck. LTFT stays at 0, STFT also stays at 0, but sometimes jumps to negative 29 and stays for a couple of minutes, then goes back to 0. What im missinf, what could be the cause of running rich?
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