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4.6 code p401 egr valve problem
ok after cleaning egr ports changing pressure sensor replacing egr and egr solenoid and check engine light still on I was giving up but after looking on a post someone mention broken vaccum line went to my truck disconect the vaccum line from the solenoid and I found no vaccum on the line check it all the way and it was broken near the battery so I fix it and now problem went away.
I want to share this experience in this forum just make sure you check vaccum on the line before doing something I spent $180 dollars changing good parts and the piece of line cost me 2.50 so is better to check that before buying or checking something else |
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Re: 4.6 code p401 egr valve problem
Thanks for the post. I hope it helps someone else that has the same problem.
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