1999 grand marquis/crown Vic o2 Sensor

Asked by Aug 09, 2017 at 03:31 PM about the 1999 Mercury Grand Marquis 4 Dr GS Sedan

Question type: Maintenance & Repair

I have 2 engine codes P0161 and P0141 I can’t
figure out where they are on the car Idk if it’s the 1
on the catalytic converter or not if you have pictures
it would be amazing.

1 Answer


The O2 sensors are on the exhaust system. To find them you need to jack up and safely support your car and then crawl under it. The 02 sensors are fairly obvious. Look on line to see what they look like.

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