What's code p1631 for ford transit 90 t350?

What's code p1631 for ford transit 90 t350?

If you type the code and vehicle in to a google search bar, you might find a/ the reason and b/ the fix.

This code refers to the power hold relay for the engine management system. If there's a permanent concern with this relay then the engine would normally cut out or fail to start. Nine times out of ten the code is set in error normally due to the ignition been cycled a couple of time in quick succession. The relay is located in the fuse box next to the battery

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