Engine Controls/Emissions - OBD II Diagnosis Aid: Overview

Bulletin No: 01-004/02

Last Issued: 02/07/2002

Subject:
DIAGNOSTIC INFORMATION OF OXYGEN SENSOR, CATALYST EFFICIENCY, AND FUEL SYSTEM MONITORS (OBDII; Truck, Tribute, 626)

APPLICABLE MODEL(S)/VINs
1996-2002 626 (2.0L 4-cylinder with Automatic Transmission)
1998-2002 626 (2.5L V-6)
1995-2002 B-Series / Truck
2001-2002 Tribute

DESCRIPTION

This Service Bulletin is intended to assist in diagnosing conditions related to Heated Oxygen Sensor (HO2S) Monitor, Catalyst Efficiency Monitor, and Fuel System Monitor Diagnostic Trouble Codes (DTCs).

NOTE:
Refer to applicable Workshop Manuals for vehicle specific OBD II information. This bulletin is NOT intended as a shortcut to troubleshooting procedures and pinpoint tests in the Workshop Manual. The pinpoint tests in the Workshop Manual should ALWAYS be followed when diagnosing vehicle concerns.

SERVICE INFORMATION INDEX

Below is an index of the information found in this bulletin:

^ DESCRIPTION OF TERMS AND ACRONYMS

^ HEATED OXYGEN SENSOR (H025) MONITOR DESCRIPTION
- H02S Locations
- H02S Monitor DTCs
- H02S Monitor Service Tips

^ CATALYST EFFICIENCY MONITOR DESCRIPTION
- Catalyst Efficiency Waveforms
- Catalyst Efficiency Monitor DTC's
- Catalyst Efficiency Monitor Service Tips

^ FUEL SYSTEM MONITOR DESCRIPTION
- Fuel System Monitor DTC's
- Fuel System Monitor Service Tips

^ GENERAL OBDII SERVICE TIPS





DISCLAIMER