P0401

NOTE: Recognition condition for the diagnostic trouble code "P0401/16785" (mech. valve continuously closed) is a coolant temperature over 72°C (162°F), an open closed throttle position switch, a throttle angle less than 42.5°, a vehicle speed between 70km/h and 105km/h (44 and 66mph), an EGR duty cycle greater than 50%, an engine speed between 1500 RPM and 3300 RPM and an engine load between 23% and 60%. If all these conditions are fulfilled and the EGR temperature signal is less than 50°C (122°F) for longer than 34 sec., the diagnostic trouble code "P0401/16785" is set.