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Home >> Buick >> 2013 >> Encore Convenience, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 83 (Data Communication System) >> Diagnostic Information and Procedures >> DTC C0550: Electronic Control Unit >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2016 Chevrolet Trax and 2016 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify that DTC B1325, B1330, B1370, B1380, B1424, B1440, B1441, B1517, C0800, C0899, C12E1, P0560, or P0562 is not set.
    • If none of the DTCs are set 
  3. Verify DTC C0550 is not set.
    • If DTC C0550 is set symptom byte 39 or 43 
    1. Program the device that set the DTC.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the device that set the DTC.
      • If the DTC does not set
    3. All OK.
    • If DTC C0550 is set with any symptom byte, except symptom byte 39 or 43 

      Replace the device that set the DTC.

    • If DTC C0550 is not set 
  4. All OK
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