Just read data from my car.
Short term fuel trim b1s2 is constantly at -100% and stft b1s1 seems to be fluctuating from anywhere between -5% all the up to 45 %.
I don’t have any error codes but mpg is very poor.
Any idea on the steps to take to find out the issue?
It’s a horrible Renault scenic II 2004 1.6 petrol