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egr flow excessive

hazmat456

Well-Known Member
Joined
May 27, 2007
Messages
191
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City, State
tomah wi
Year, Model & Trim Level
1997 mercury mountaineer
have had this truck for two years had code p0402 when i got it. Sprayed egr rod? with wd-40 and worked it back and fourth with flat blade screwdriver, code went away. six months later code came back, sprayed it again code goes away. did this again yesterday,light went off after a couple of drive cycles. Will this damage the diaphram? will somthing else last longer?

97merc mountaineer 5.0 with the PITA to change egr
 






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