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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information and Procedures >> DTC P20EE, P249D, or P249E >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify that DTCs P0070, P0071, P0072, P0073, P0074, P00C7, P00E9, P00EA, P00EB, P00EC, P0100, P0101, P0102, P0103, P0106, P0107, P0108, P0111, P0112, P0113, P0114, P0116, P0117, P0118, P0119, P0128, P0201, P0202, P0203, P0204, P020A, P020B, P020C, P020D, P0216, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P02EE, P02EF, P02F0, P02F1, P0405, P0406, P049D, P0502, P0503, P062B, P062D, P0722, P0723, P111E, P1248, P1249, P124A, P124B, P126A, P202E, P2147, P2148, P2150, P2151, P2227, P2228, P2229, or P2230 are not set.
    • If any of the DTCs are set 
    1. Refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
    2. Perform the scan tool Reductant System Malfunction Warning Service Bay Test after diagnosing other DTCs
      • If the test does not pass

        Refer to Circuit/System Testing.

      • Go to next step: If the test passes

        Go to next step: All OK.

    • Go to next step: If no other DTCs are set 
  2. Verify that DTC P20EE, P249D, or P249E is not set
    • If a DTC is set 

      Refer to Circuit/System Testing

    • Go to next step: If no DTC is set 
  3. All OK.
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