LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Controls - Powertrain DTC Charts & Descriptions (Diesel)) >> Diagnostic Trouble Code (DTC) Charts and Descriptions >> P0401 - Exhaust Gas RECIRCULATION (EGR) Flow Insufficient Detected

P0401 - Exhaust Gas RECIRCULATION (EGR) Flow Insufficient Detected

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
P0401 - EXHAUST GAS RECIRCULATION (EGR) FLOW INSUFFICIENT DETECTED

Description:  Estimated EGR percent is less than the minimum limit for the operating conditions. This DTC sets when the pressure ratio of the manifold absolute pressure (MAP) sensor signal and the exhaust pressure (EP) sensor signal across the EGR valve is not as expected.
Possible Causes: 
  • Aftermarket intake systems or exhaust systems
  • Restricted air flow (intake or exhaust)
  • Restricted EGR cooler
  • EGR valve position sensor bias
  • Exhaust pressure (EP) sensor bias
  • Manifold absolute pressure (MAP) sensor bias
  • Damaged EGR valve
Diagnostic Aids:  The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST W .
scientia non olet · About LEMON Manuals