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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 1.4L (LUJ, LUV) - DTC P0300 To DTC P2635 And Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P1400: Cold Start Emission Reduction Control System >> Circuit/System Testing

Circuit/System Testing

  1. Inspect the air intake system for the following:
    • Damage, restriction or modification
    • Dirty or deteriorating air filter element
    • Crankcase ventilation system for correct operation.
    • Water intrusion
    • Vacuum leak and other unmetered air downstream of the mass air flow (MAF) sensor
    • Intake manifold leak
  2. Inspect the exhaust system for the following:
  3. Inspect for an engine mechanical condition that could alter the air flow into the combustion chamber. Refer to Symptoms - Engine Mechanical .
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