PRECAUTION DOOR CONTROL RECEIVER EXPRESSIONS (a) The type of door control receiver used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section.
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Toyota Tundra Service Manual > Sfi System: Catalyst System Efficiency Below Threshold (Bank 1) (P0420,P0430)
MONITOR DESCRIPTION The ECM uses sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the Air-Fuel Ratio (A/F) sensor, sends pre-catalyst information to the ECM. The second sensor, the Heated Oxygen (HO2) sensor, sends post-catal ...
