TSB-13-13-002REV

Improper Secondary Parameter judgement criteria may cause false MIL illumination during 3rd Oxygen Sensor Monitoring (P0145). This TSB provides a field fix procedure to address false MIL illumination with DTC P0145 (Heated oxygen sensor (3rd) circuit slow response) stored in the ECM. This software update optimizes the judgement criteria to minimize false MIL illumination.