LEMON Manuals: Even more car manuals for everyone
Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 36 (Engine Controls (Except Diesel & Hybrid) - Powertrain DTC Descriptions - DTC P0193 - P0563) >> DTC P0405: Exhaust Gas RECIRCULATION (EGR) Sensor A Circuit Low

DTC P0405: Exhaust Gas RECIRCULATION (EGR) Sensor A Circuit Low

WARNING: This page is about a different variant/trim than selected.
P0405 - EXHAUST GAS RECIRCULATION (EGR) SENSOR A CIRCUIT LOW

Description:  The EGR monitor checks the differential pressure feedback EGR sensor signal to the PCM for low voltage. The test fails when the average voltage to the PCM drops to a voltage less than the minimum calibrated value.
Possible Causes: 
  • Differential pressure feedback EGR circuit short to ground
  • Damaged differential pressure feedback EGR sensor
  • VREF circuit short to ground
Diagnostic Aids:  A DPFEGR PID reading less than 0.05 volt with the ignition ON, engine OFF or running indicates a hard fault.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST HH .