Engine Controls - MIL ON/O2 Sensor DTC's Set

Classification:
EC03-013a

Reference:
NTB04-002a

Date:
February 5, 2004

'01 - '02 XTERRA/FRONTIER WITH VG33: MIL 'ON' WITH MULTIPLE FRONT/REAR 02 SENSOR DTCS

ATTENTION:
THIS BULLETIN HAS BEEN REVISED.

^ The Applied Vehicles and Parts Information sections were revised.

^ Please use this bulletin NTB04-002a for complete information.

^ Discard all previously distributed copies of NTB04-002.





APPLIED VEHICLES

NOTE:
This bulletin currently does not apply to:
2001 Xterra with VG33E non-supercharger (non-S/C)
2001 Frontier with VG33E non-supercharger (non-S/C)

IF YOU CONFIRM:





An Applied Vehicle has the MIL "ON" with one or more, and any combination of the Diagnostic Trouble Codes (DTCs) shown stored in the ECM.

DETERMINE IF:

There is water or water corrosion inside any of the affected 02 sensor connectors, where the sensor connectors plug into the engine main harness.

ACTIONS:

^ Verify the incident.

^ Install the appropriate parts from the Parts Information section of this bulletin.

^ Erase any stored DTCs.

NOTES:
^ The 02 sensors listed below have "RS-style" connectors. This same style is also fitted to the listed Engine Control Harness where it plugs into the 02 sensors.

^ "RS-style" connectors can withstand high-pressure power cleaning of the engine.

CAUTIONS:
^ Do not try to cut and re-connect the "RS-style" connectors to the original harness.

^ If you were to try a connector swap, the connector would not seal out water properly and the incident would return.

^ You must install the complete harness and all sensors from the Kit.

IMPORTANT:
The purpose of "ACTIONS" (above) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire Service Procedure as it contains information that is essential to successfully completing this repair.





PARTS INFORMATION





CLAIMS INFORMATION

SERVICE PROCEDURE

1. Verify the incident as described.

2. Use CONSULT-II to check SELF-DIAGNOSIS results:

^ If there are stored DTCs other than the ones listed, this bulletin does not apply. Use the appropriate Service Manual to check for other causes.

^ If the stored DTCs match the list, clear those codes and proceed to step 3.

3. Write down the radio presets for later "reprogramming" back into the radio.

4. Disconnect the negative battery terminal.

5. Replace the Engine Control Harness with the one from the Parts Information section of this bulletin. Refer to the "EL" section of the Electronic Service Manual for replacement procedures, if needed.

6. Replace the 02 sensors with the ones from the Parts Information section of this bulletin.





7. Install the Connector Bracket adapters from the Kit to the connectors shown in Figure 1.

8. Re-connect the battery.

9. "Re-program" the radio presets you wrote down in step 3.