Incredible Mercury Grand Marquis Check Engine Light Blinking References. I did check the gas cap and it was fine. If there is anything that you would like to add, please feel free to leave a comment below.
Problem with exhaust gas oxygen sensor (lambda probe): 12k views 9 years ago. Web i’ve recently been having problems with my 2001 mercury grand marquis ls (has about 215,000 miles on it) where, after the engine has been running for about ten minutes, the check engine light starts blinking at around 40mph and i.
