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Home › Cadillac › 2009 › DTS 4.6 9 › Repair and Diagnosis › Engine Performance › System › Engine Control System & Fuel System - 4.6L - DTC P0016 To DTC P0336 › DTC P0116 › Circuit/System Verification

Circuit/System Verification

  1. Ignition OFF, inspect the cooling system surge tank for the proper coolant level. Refer to Cooling System Leak Testing and Cooling System Draining and Filling (Vac-N-Fill) or Cooling System Draining and Filling (Static Fill) .
  2. Inspect the thermostatically controlled coolant heater, if equipped, for damage or modifications. Test for proper operation of the coolant heater. Refer to Coolant Heater Inoperative .
  3. Ignition OFF for 8 hours or more.
  4. Ignition ON, engine OFF, observe the scan tool IAT and the ECT sensor parameters. The ECT, IAT, and the ambient temperature should be within 15°C (27°F) of each other.
  5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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