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Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify no other DTCs are set.
    • Go to next step: If no other DTCs are set 
  3. Replace the K20 Engine Control Module
  4. Verify DTC P0071 did not set.
    • If DTC P0071 is set 

      Replace the P16 Instrument Cluster

    • Go to next step: If DTC P0071 did not set 
  5. All OK.
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