Q45t V8-4130cc 4.1L DOHC MFI (VH41) (1997)
Figure 4
Engine Harness
MIL 'on' with DTC P0156 (rear O2 sensor - right bank)
Figure 5
1.
Disconnect the rear O2 sensor from the harness connector E133 (see Figure 5).
2.
Inspect both connectors (male and female) for water or corrosion on the surface of the pins or inside the plastic housing of the connectors. The
corrosion will appear as discoloration typically with a white to light green powder appearance. The corrosion may be found on only one pin.
3.
If water or corrosion is confirmed in the O2 sensor or connector E133, you must replace all of the following items to permanently resolve the
incident: