Mil "On" With Rear O2 Sensor DTC P0138/P0139/P0158/P0159/P1147/P1167 (ITB03-009)

Publication date: 2003-02-05
Reference number: ITB03-009

MIL "ON" WITH REAR O2 SENSOR DTC P0138/P0139/P0158/P0159/P1147/P1167

TECHNICAL SERVICE BULLETIN

Reference Number(s): ITB03-009, Date of Issue: February 5, 2003

INFINITI:	2002 QX4
CLASSIFICATION:	EC03-002
SECTION:	Engine Control System
APPLIED VEHICLE(S):	2002 QX4 (JR50)

IF YOU CONFIRM

An applied 2002 QX4 has the MIL "ON" and any of the following DTC's are stored in the ECM:

P0138 (Bank 1) H02S2 (Rear) (High Voltage Monitoring)
P0139 (Bank 1) H02S2 (Rear) (Response Monitoring)
P1147 (Bank 1) H02S2 (Rear) (Max Voltage Monitoring)
P0158 (Bank 2) H02S2 (Rear) (High Voltage Monitoring)
P0159 (Bank 2) H02S2 (Rear) (Response Monitoring)
P1167 (Bank 2) H02S2 (Rear) (Max Voltage Monitoring)

DETERMINE IF

This bulletin applies by checking the ECM Part Number. You will do this by performing steps 1-3 in the Service Procedure.

ACTIONS

If this bulletin applies,

Perform ECM Reprogramming. This is required if the ECM Part Number (P/N) in the vehicle matches one of those listed under "Current ECM P/N" in CURRENT ECM'S .
Replace the Rear Oxygen Sensor(s). This is required if ECM Reprogramming is needed.

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

Description	P/N	Qty
Rear Oxygen Sensor Bank-1 (for DTC P0138/P0139/P1147)	226A0-4W011	1
Rear Oxygen Sensor Bank-2 (for DTC P0158/P0159/P1167)	226A1-4W011	1

CLAIMS INFORMATION

Submit a Primary Failed Part (PP) line claim using the following claims coding:

CLAIMS INFORMATION

Description

PFP

OP Code

SYM

DIA

FRT

Reprogram ECM per TSB ⁽¹⁾

⁽²⁾

DE98AA

0.7 hrs.

RPL One Rear O2 Sensor

---

DE49AA

---

⁽³⁾

RPL Both Rear O2 Sensors

---

DE51AA

---

⁽³⁾

⁽¹⁾	The FRT for this Op Code Contains sufficient time allowance for the required diagnosis. Do NOT claim any diagnostic Op Codes on this claim.

⁽²⁾	Reference the final CONSULT-II printout and use the new ECM P/N as the PFP.

⁽³⁾	Reference the current Infiniti Warranty Flat Rate Manual and use the indicated FRT.

SERVICE PROCEDURE

Determine which DTC code is stored in the vehicle's ECM by performing CONSULT-II Self-Diagnosis.
Print out the Self-Diagnosis results for use in:
- ECM Part Number Check (step 3), and
- Determining which Rear Oxygen Sensor(s) will be replaced.
  NOTE: See Fig 1 for an example of the CONSULT-II Self-Diagnosis printout.
  
  Fig 1: Self-Diagnosis Printout

Compare the vehicle's current ECM P/N (from your CONSULT-II Self Diagnosis printout) to those shown under Current ECM P/N in CURRENT ECM'S , below:

CURRENT ECM'S

Vehicle	Current ECM P/N
M/T	23710-5W500
A/T	23710-5W510

If the ECM P/N in the vehicle matches one of those listed under "Current ECM P/N" in CURRENT ECM'S (above):
- Look in the "Vehicle" Column in CURRENT ECM'S (above) and determine the vehicle's transmission (MT or A/T). Make a note of the vehicle's transmission and perform ECM Reprogramming, below.
If the ECM P/N in the vehicle does not match one of those listed under "Current ECM P/N" in CURRENT ECM'S (above):
- This bulletin does not apply. Use the appropriate Electronic Service Manual (ESM) to further diagnose and repair the incident.

ECM REPROGRAMMING

Perform ECM Reprogramming to install the latest available ECM data.
- If you're not familiar with ECM Reprogramming, refer to ITB00-005C , ECM REPROGRAMMING FOR INFINITI VEHICLES.
- For those familiar with ECM Reprogramming, perform the following:
  
  Fig 2: Reprogramming ECM (Standard)
  1. Select model and model year for the applied vehicle (example: QX4, 2002).
  2. Select the vehicle's transmission you are working on from those listed in the upper right ECM data description window. The vehicle's transmission must match the type you made note of in step 3A (example: Update for A/T Models).
  3. Make a note of the "To" number listed in the "ECM Reprogramming Data" Summary screen.
    NOTE: The "To" number will read: 23710-XXXXX.
  4. Press "Continue" and follow directions to perform data download from ASIST to CONSULT-II.
  5. Then reprogram the vehicle's ECM. When reprogramming from CONSULT-II, select the "To" number that you made note of in step C, above.
Next step: Replacing the Rear Oxygen Sensor(s) (below).

REPLACING THE REAR OXYGEN SENSOR(S)

As shown by the DTC on the CONSULT-II self-diagnosis printout: Replace the incident bank(s) rear oxygen sensor(s). See Parts Information.
Refer to the EC section of the Service Manual (ESM) for Oxygen Sensor replacement information.
Use CONSULT-II to do the following:
- Erase the DTC code(s).
- Test drive the vehicle and confirm DTC P0138, P0139, P0158, P0159, P1147, or P1167 is repaired.