Delta Pressure Feedback Electronic (DPFE) EGR Transducer
Faults in DPFE transducer or circuit should set a service code. See QUICK TEST in G - EEC-IV TESTS W/CODES article in the ENGINE PERFORMANCE Section. If service code has not been set, see CIRCUIT TEST DL in G - EEC-IV TESTS W/CODES article in the ENGINE PERFORMANCE Section diagnostic procedures.