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Home >> Chevrolet >> 2017 >> Traverse LS Base >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Diagnostic Information and Procedures >> DTC P1258: Engine Coolant Overtemperature - Protection Mode Active >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON.
  2. Verify DTC P0480, P0481, P0691, P0692, P0693, or P0694 is not set.
    • If no DTCs is set 
  3. NOTE:

    A short delay occurs before the ECM changes the cooling fan speed.

  4. Verify the cooling fan operates at each available speed as commanded with a scan tool.
    • Cooling fan operates 
  5. Verify that the engine does not overheat.
    • Engine does not overheat 
  6. Operate the vehicle within the Conditions for Running the DTC.
    • If the DTC does not set 
  7. All OK