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You have a 1997 mercury mountaineer 50 liter and you replaced the egr valve and solenoid what else can be making by check engine stay on?
Wiki User
∙ 14y ago
I had the same problem; did alot of research and found that the ERG valve wasn't the issue. There is a device just before the ERG Valve called a DPFE sensor that was causing the error but the computer couldn't differentiate it.
Check out this link and replace this part. It takes about an hour and its a bit of a pain but it cleared my check engine problem once and for all.
http://www.explorerforum.com/forums/showthread.php?t=164517
Wiki User
∙ 14y ago
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02 mountaineer- service engine soon light on- getting 401 and 125 codes have replaced the egr valve egr solenoid and temp sensor service light on again within 2 miles why?
try changing the d.p.f.e. cost about $35,i just replaced one on a 2003 mercury mountaineer.
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