Possible causes

– Incorrect Self-Test Procedure
– Unexpected response from the self-test monitors
– RPM out of specification

When is the code detected?

Self test was begun but not completed in the proper time allotted

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1001 FORD Description

This non-MIL (Malfunction Indicator Lamp) code is set when the Key On/Engine Running (KOER) self-test does not complete in the time intended.