Anyone know how to clear the MIL4 light from flashing .It has been doing it since I had the exhaust off to repair it AGAIN .When I did this I unplugged the O2 sensor and had the key turned on a couple times to check something else so I am guessing the that it what set the code. In the manual it says it will blink if fuel system trouble or history error codes not erased . Hate to have to take to dealer just to clear code . By the way it is a 2016 zforce 500 . Thanks