Error Code. Ford. PO603

Question

Is the troubleshoot for this code the same on a '97 F-250 7.3L as the ones listed for other makes and models?

Answer 1

Hi there

The troubleshooting is the same. The code is for the keep alive circuit for the ecm. Usually it's a blown fuse or a bad wire causing the problem.

P0603 FORD - ECM Keep Alive Memory Test Error

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