Carry out the following procedures if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:
1. Stop the engine. Set the parking brake and shift the shift lever to P. 2. Remove the mud, snow or sand from around the rear wheels. 3. Place wood, stones or some other material to help provide traction under the rear wheels. 4. Restart the engine. 5. Shift the shift lever to D or R and release the parking brake. Then, while exercising caution, depress the accelerator pedal. ■When it is difficult to free the vehicle
Press Turn off TRAC and/or VSC if these functions are hampering your attempts to free the vehicle.
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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 ...