P0171 code keeps appearing on my Zafira. It appears when I drive over 25 mph, and the short and long-term fuel trims increase while driving. The short trim would be on 15 percent and the long trim on 0%. Sometimes the short trim returns to 0 and the long trim increases gradually to 18%. I tried ruling out it being a vacuum leak by pressing the acc pedal and seeing if the fuel trims would jump down, but it did not affect anything.
The code came yesterday, I cleared it, and it returned again today. Some help on this, please.
The code came yesterday, I cleared it, and it returned again today. Some help on this, please.
