Toyota Tundra Service Manual: Removal

REMOVAL

PROCEDURE

1. REMOVE NO. 1 ENGINE UNDER COVER

2. DRAIN ENGINE COOLANT

3. REMOVE V-BANK COVER SUB-ASSEMBLY

4. REMOVE AIR CLEANER HOSE ASSEMBLY

5. REMOVE THROTTLE BODY ASSEMBLY

(a) Disconnect the 2 water by-pass hoses.

(b) Disconnect the throttle position sensor and control motor connector.

(d) Remove the No. 12 water by-pass hose from the throttle body.

(e) Remove the No. 4 water by-pass hose from the throttle body.

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