2001 Mercury Sable with P1633 service code, what is the meaning?

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Carguy1 · Answer 1 · 2017-04-07T23:53:49+0000

HI there

This code is for the keep alive circuit for the ecm. This is either a blown fuse, bad wire to the ecm or the ecm itself causing this code.

OBDIITech · Answer 2 · 2021-05-18T03:52:47+0000

P1633 MERCURY - Keep Alive Power Voltage Too Low

Read more: https://www.autocodes.com/p1633_mercury.html