P1398

Test 1:

Tests 2 - 5:

SYMPTOM
P1398-MIS-FIRE ADAPTIVE NUMERATOR AT LIMIT

WHEN MONITORED
Under closed throttle decel with A/C OFF; ECT above 75, and more than 50 seconds after engine start.

SET CONDITION
One of the CKP sensor target windows has more than 2.86% variance from the reference window.

POSSIBLE CAUSES
- Intermittent Condition
- Tone Wheel/Pulse Ring Inspection
- Wiring Harness Inspection
- Crankshaft Position Sensor