|
|
Content .. 1164 1165 1166 1167 ..
Last Modified: 9-16-2014 6.6 C Doc ID: RM000003Q3501WX Model Year: 2015 Model: Tundra Prod Date Range: [08/2014 - ] Title: 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0401; Exhaust Gas Recirculation Flow Insufficient Detected; 2015 MY Tundra [08/2014 - ] DTC P0401 Exhaust Gas Recirculation Flow Insufficient Detected DESCRIPTION signals such as engine speed, coolant temperature, electric load, and vehicle speed. When the EGR permission DTC NO. DTC DETECTION CONDITION TROUBLE AREA P0401 Change in intake manifold pressure is small when the EGR valve is opened and closed during idle fuel cut operation (2 trip detection logic) EGR valve assembly EGR passages EGR cooler assembly Manifold absolute pressure sensor Intake system MONITOR DESCRIPTION The ECM monitors the pressure inside the intake manifold while opening and closing the EGR valve during fuel cut operation. If there is no change in the manifold absolute pressure sensor value, the ECM interprets this as a malfunction in the EGR valve assembly, illuminates the MIL and stores the DTC (2 trip detection logic). MONITOR STRATEGY Related DTC P0401: EGR valve high flow rate / low flow rate Required sensors/Components (Main) EGR valve assembly, manifold absolute pressure sensor Required sensors/Components (Related) Engine coolant temperature sensor, vehicle speed sensor Duration 3 seconds MIL operation 2 driving cycles TYPICAL ENABLING CONDITIONS Monitor runs whenever following DTCs are not present None Time after engine started 3 seconds or more 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0401; Exhaus... |