REMOVAL PROCEDURE 1. REMOVE NO. 1 ENGINE UNDER COVER 2. REMOVE DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY  (a) Disconnect the differential actuator hose. (b) Disconnect the differential actuator connector. (c) Remove the 4 bolts and differential vacuum actuator assembly. |
Toyota Tundra Service Manual > Sfi System: Exhaust Gas Recirculation Flow Insufficient Detected (P0401)
DESCRIPTION Based on the driving conditions, the ECM regulates the volume of exhaust gas that is recirculated to the engine's combustion chambers and thus lowers the combustion temperature to reduce NOx emissions. The ECM monitors signals such as engine speed, coolant temperature, electric load, and ...
