2000 Mercury Marquis check engine light is on!

2000 MERCURY MARQUIS

77,000 MILES • V8 • 2WD • AUTOMATIC

ZEVIKA

MEMBER
1 POST
FOLLOW

check engine light came on and stayed on.

I checked the transmission fluid and it's O.K.

I don't know how to check the "O" sensor on my own.

I want to take into a shop but I don't want to be taken advantage on! I don't min paying for the repair as long as it's warranted.

any idea what could be the problem?

thanks for your help in advance

Jan 29, 2010 at 12:33 AM

RASMATAZ

CAR REPAIR CONTRIBUTOR
75,992 POSTS

Have the computer scanned for code/s-you have a problem within the engine manangement system that caused the CEL to turn on-This is your starting point of diagnosis,finding out what's going on.

Jan 29, 2010 at 12:43 AM

HAWAII808

MEMBER
6 POSTS

my name is alan.my car is 2005 mercury grand marquis 4.6liter g/s &gas engine "w". i just put my (cold air intake system in my car" but i don't known why (engine lite on). please! tell me why? or i did wrong .may be reset the computer or what else!!!!!!! please! help me.thank a lots!!!!!

Feb 3, 2010 at 1:16 AM

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