Code PO1633

Asked by Jul 26, 2017 at 02:55 PM about the 2004 Ford Taurus

Question type: Maintenance & Repair

So Change fuel filter still no change went and got
the car tested to see what was the problem any
suggestions for what to do the code it read was

1 Answer


Fault Code PO1633 means KAM voltage too low. KAM means "Keep Alive Memory". When you disconnect the battery or if the battery is failing, this code can occur and the computer will "forget" some of it's operating parameters. I expect the computer can relearn these when operating normally for a while so I would ignore the code if the battery is able to start the car. Do a voltage test with the motor running 14.5 volts, and again when it's off 12.0 volts. If that test is okay, I would not worry.

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