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Car Forum / Driving, Maintenance, Tuning / General Car Topics / January 2005

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Merc Grand Marquis Check Engine light

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Dick L - 28 Dec 2004 15:27 GMT
93 V8, 135K miles, runs great, well cared for - but over 60 mph the Check
Engine light comes on intermitantly - bel;ow 60 all is OK. Ideas?
WEBPA - 28 Dec 2004 22:55 GMT
>93 V8, 135K miles, runs great, well cared for - but over 60 mph the Check
>Engine light comes on intermitantly - bel;ow 60 all is OK. Ideas?

Oxygen sensor or MAS.
webpa
dnoske@shaw.ca - 04 Jan 2005 05:37 GMT
You need to determine the reason the light comes on by using a code
reader tool or scan tool. Common code under load is for EGR circuit.

>93 V8, 135K miles, runs great, well cared for - but over 60 mph the Check
>Engine light comes on intermitantly - bel;ow 60 all is OK. Ideas?
 
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