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Home >> Cadillac >> 2018 >> CTS Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> DTC P0070 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC B0158 is not set.
    • Go to next step: If the DTC is not set 
  3. Verify DTC P0070 is not set.
    • If the DTC is not set 

      All OK.

    • Go to next step: If DTC P0070 is set 
  4. ClearDTC P0070
  5. Verify the DTC does not set.
    • If the DTC is not set 

      All OK.

    • Go to next step: If DTC P0070 is set 
  6. Ignition/Vehicle - Off - For greater than 3 h

    Verify the following parameters are within 15°C (59°F) of each other:

    • IAT Sensor 1
    • Ambient Air Temperature
    • If not in the specified range 

      Replace the component: B9 Ambient Air Temperature Sensor

    • Go to next step: If in the specified range 
  7. Verify DTC P0070 is not set.
    • If the DTC is not set 

      All OK.

    • Go to next step: If DTC P0070 is set 
  8. Perform all necessary programming and setup procedures for the control module: P16 Instrument Cluster
  9. Verify DTC P0070 is not set.
    • If the DTC is not set 

      All OK.

    • Go to next step: If DTC P0070 is set 
  10. Perform all necessary programming and setup procedures for the control module: K9 Body Control Module
  11. Verify DTC P0070 is not set.
    • If the DTC is not set 

      All OK.

    • Go to next step: If DTC P0070 is set 
  12. Perform all necessary programming and setup procedures for the control module: K20 Engine Control Module
  13. Verify DTC P0070 is not set.
    • If the DTC is not set 

      All OK.

    • Go to next step: If DTC P0070 is set 
  14. Replace the control module: K20 Engine Control Module
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