Read KOEO Fast Codes / Read KOEO Slow Codes — Ford system allows only one Self-Test function per key on

What does Read KOEO Fast Codes / Read KOEO Slow Codes mean?

This message appears when attempting to run the KOEO (Key On, Engine Off) self-test function multiple times without cycling the ignition. The Ford system restricts self-tests to one per ignition cycle.

• Attempting to run the self-test function more than once without cycling the ignition.

Click steps to track your progress.

1. 1

   Turn the ignition key to the OFF position for at least 10 seconds.

2. 2

   Turn the ignition key back to the ON position (engine off).

3. 3

   Attempt the KOEO Fast Codes or KOEO Slow Codes test again.