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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 2.4L - DTC P0628 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P1400: Cold Start Emission Reduction Control System >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Allow the engine to cool until the catalyst temperature is less than 500°C (932°F) and the engine coolant is greater than 10°C (+14°F).
  2. Idle the engine for greater than 2 minutes.
  3. Observe the scan tool DTC information. DTC P1400 should not set.
  4. 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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