Pathfinder 4WD V6-4.0L (VQ40DE) (2006)
6. Disconnect harness connector and remove air fuel ratio sensor 1 (left bank) using Tool.
Tool number: KV991J0050 (J-44626)
CAUTION:
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Be careful not to damage air fuel ratio sensor 1.
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Discard any air fuel ratio sensor 1 which has been dropped from a height of more than 0.5 m (19.7 inch) onto a hard surface such as a
concrete floor; replace with a new sensor.
7. Remove three way catalyst (left bank).
8. Loosen nuts with power tool in reverse order as shown.
NOTE: Disregard the numerical order No. 7 and 8 in removal.
9. Remove gaskets.
CAUTION: Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
Surface Distortion
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Check the surface distortion of the exhaust manifold mating surface with straightedge and feeler gauge.