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check eng light


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moonshine
New User

Feb 11, 2009, 6:58 AM

Post #1 of 2 (1607 views)
check eng light Sign In

2000 ford explorer 4.o lt. v-6 4x4 150 k miles check eng light comes on last for 2 to 4 days after turn off . new cats x 2 , cat senors x 4 checked w/ obv meter ,
light after runing codes , code p0142 ,144 ,said egr valve not working but is . runs rough when lights is on . i am a ex master mechainc and ex master computer
tech . thinking about taking apart the autos computr box and removing CMOS battery out and short the neg and pos so as to reset the cmos back to factory
setting . has any one done this ? or can ant one offer a diff sternoi .


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Feb 11, 2009, 4:57 PM

Post #2 of 2 (1602 views)
Re: check eng light Sign In

P0142 & P0144 are telling you that there is a problem in the EGR system. Not neccessarily (and probably not) the EGR valve, itself. The most common causes of these codes are DPFE sensor and/or plugged passageway. I would strongly recommend you stay away from the computer.Unsure
Loren
SW Washington






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