P1400 check engine light code..Ford based issue

2002 MERCURY SABLE
150,000 MILES
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RENAV
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My engine light is on and when the code was checked it said it was a P1400 code. I am wondering if you could help me locate the part that needs to be replaces and what area it is in and what I am looking for? Thanks in advance for any help you can give.
May 2, 2016 at 2:18 PM
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HMAC300
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could be either item in pic as well as egr valve or partially blocked egr lines a broken vacuum line etc.
May 2, 2016 at 3:52 PM