DESCRIPTION This DTC is detected if a wheel speed malfunction signal is sent from the skid control ECU.
PROCEDURE
(a) Clear the DTC (See page
(b) Check if the same DTC is output (See page
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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 ...