hi all:

Mercury Mystique 96 2.0L

I need some help on a steady CEL
error code = 0171 System too lean Bank 1

Any remedies ??
or does it need further testing. I would appreciate if someone could point me in right direction.

Also,
how do you reset the CEL ? Can you just disconnect battery and push brake pedal 10-15 s to completely drain current in circuit,
or do I need to go to dealer.

thanks,
Hugues -