P1001 – Key On/Engine Running Not Able To Complete

P1001 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1001 Possible Causes

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

P1001 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.