Toyota Tundra Service Manual: Removal

REMOVAL

PROCEDURE

1. DISCONNECT NO. 2 AIR HOSE

(a) Disconnect the air switching valve assembly connector.

(b) Slide the clamp and disconnect the No. 2 air hose.

2. REMOVE AIR SWITCHING VALVE ASSEMBLY

(a) Remove the bolt and disconnect the wire harness clamp bracket from the cylinder head cover.

(b) Remove the 2 bolts.

NOTICE:

Be careful not to damage the installation surface of the gaskets.

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 ...

Toyota Tundra Owners Manual