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Home >> Suzuki >> 2008 >> XL7 Limited, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0128 >> Circuit/System Verification
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Circuit/System Verification

  1. Verify that the engine coolant level is correct.
    • If the engine coolant is not at the correct level, refer to LOSS OF COOLANT .
  2. Verify that the engine coolant temperature is at the normal operating temperature.
    • If the engine coolant temperature is below normal operating temperature, refer to THERMOSTAT DIAGNOSIS .
  3. 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. DTC P0128 should not set.
  4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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