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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P0016 - P049D)) >> Diagnostic Information And Procedures >> DTC P0403, P0490, P1402, P1407, Or P140F: Exhaust Gas Recirculation (EGR) Circuits/Exhaust Gas Recirculation (EGR) Current Performance >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition ON
    2. NOTE:

    When using an Scan tool Control Functions, Engine Reduced Power and Clean Exhaust Filter messages may occur after a short delay when commanding large EGR positions. The messages are a result of ECM protecting hardware during device control mode. No DTCs will be stored and the Diesel Particulate Filter does not need to be service cleaned. Exiting device control will restore normal function.

  2. Verify the EGR Position Sensor percentage parameter remains within 5% of the EGR Valve Commanded State when commanding the EGR valve between 0 - 100% with a scan tool.
    • If not within 5% 

      Refer to Circuit/System Testing.

    • Go to next step: If within 5% 
  3. Operate the vehicle within the Conditions for Running the DTCs. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  4. Verify a DTC does not set.
    • If a DTC sets 

      Refer to Circuit/System Testing

    • Go to next step: If a DTC does not set 
  5. All OK.
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