Toyota 1996 LAND CRUISER User Manual page 522

DI−86
INSPECTION PROCEDURE
1 Are there any other codes (besides DTC P0420) being output?
NO
2 Check heated oxygen sensor (bank 1 sensor 1) (See page SF−64).
OK
3 Check heated oxygen sensor (bank 1 sensor 2) (See page SF−64).
OK
Replace front exhaust pipe (front catalyst)
and rear TWC (rear catalyst) (See page
EM−110).
1996 LAND CRUISER (RM451U)
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DIAGNOSTICS − ENGINE
YES Go to relevant DTC chart.
NG Repair or replace.
NG Repair or replace.
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Version 1.00 - 12/21/2010