P0403

DTC P0403 Exhaust Gas Recirculation (EGR) Solenoid Control Circuit

Circuit Description

The ECM controls the EGR valve opening based on the engine running condition and by controlling the EGR solenoid. The EGR valve position is detected by the position sensor and relayed to the ECM.

If the ECM detects an open circuit or short circuit on the solenoid circuits this DTC will set. (Solenoid Circuit Error Diagnosis)

If the ECM detects an excessively high EGR valve solenoid commanded duty ratio this DTC will also set. (Control Duty Ratio Too High Diagnosis)

Condition for Running the DTC

Solenoid Circuit Error Diagnosis:

^ DTC P0404 is not set.
^ The battery voltage is between 10 to 16 volts.
^ The ignition switch is ON.
^ The EGR control is commanded ON.

Control Duty Ratio Too High Diagnosis:

^ DTCs P0404 P0405 P0406 P042E P0652 and P0653 are not set.
^ The battery voltage is between 10 to 16 volts.
^ The ignition switch is ON.

Condition for Setting the DTC

Solenoid Circuit Error Diagnosis:

^ The ECM detects that the EGR valve solenoid control pulse width modulation (PWM) signal is not inputted.

Control Duty Ratio Too High Diagnosis:

^ The ECM detects that the EGR valve solenoid commanded duty ratio is more than 85% for longer than 8 seconds.

Action Taken When the DTC Sets

^ The ECM illuminates the MIL when the diagnostic runs and fails. Refer to DTC Type Definitions for Action Taken When the DTC Sets - Type A.
^ The ECM limits fuel injection quantity.
^ The ECM inhibits EGR control.
^ The ECM inhibits DPF regeneration control.
^ The ECM inhibits cruise control.

Condition for Clearing the DTC

^ Refer to DTC Type Definitions for Condition for Clearing the MIL/DTC - Type A.

Diagnostic Aids

^ If an intermittent condition is suspected refer to Intermittent Conditions in this section.
^ A sticking or intermittently sticking EGR valve may set this DTC.

Circuit/System Testing DTC P0403