MIL ON - DTC P0130/P0136 (Front/Rear O2 Sensor Circuit)

Classification:
EC97-014

Reference:
NTB97-047

Date:
July 9, 1997

1997 ALTIMA MIL "ON"; DIAGNOSTIC TROUBLE CODE (DTC)
P0130 AND/OR P0136

APPLIED VEHICLE:
1997 Altima (U13)

SERVICE INFORMATION

If a 1997 Altima has the MIL "on" and DTC P0130 (front heated oxygen sensor circuit) and/or P0136 (rear heated oxygen sensor circuit) stored in Self Diagnosis, there may be corrosion in the engine control module (ECM) and harness connector sockets.

If corrosion exists CONSULT Freeze Frame Date will indicate the DIG was stored shortly after start during engine warm-up. However the 02 sensors will respond normally when checked at warm engine. Use the following diagnosis and repair for this incident.

SERVICE PROCEDURE

1. Check the 02 sensor voltage in CONSULT Data Monitor mode immediately after starting a cold engine. If it is greater than 1.0 volts, the ECM connection is corroded. You may be able to visibly confirm corrosion on the edges of the ECM connector male pins or inside the female sockets of the ECM connector from the engine control harness (corrosion is typically a blue/green discoloration).

2. If voltage was greater than 1.0 volts or corrosion was visible, do the following:





A. Replace the ECM (see Figure 1).





B. Replace the engine control harness (see Figure 2).

C. If you need to lubricate the bulkhead grommet for the engine control harness, use a light application of silicone spray. Be careful not to over-spray the area. Do not use soapy water.

D. Clear the Self-Diagnosis code and verify that the code does not return after a cold start test drive.





PARTS INFORMATION

CLAIMS INFORMATION

When applicable normal claims coding applies.