90 Park Ave Intermittent SES code 42

TpShark

New Member
I need some help on where to start troubleshooting this code...new spark plugs/wires?...new coil pack?...any thoughts would be great.....when the SES light is off the car runs smooth...when it is on it idles rough...hesitates and feels sluggish and shifts rough. Any thoughts on where to start would be appreciated
 
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