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Home >> Saab >> 2011 >> 9-5 Turbo4, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Management And Fuel System, 2.0L Petrol >> Fault diagnosis, fault codes >> DTC P1400: Cold Start Emission Reduction Control System >> Circuit/System Testing

Circuit/System Testing

  1. Inspect the air intake system for the following:
    • Modified, damaged, or restricted
    • Dirty or deteriorating air filter element
    • Crankcase ventilation system for correct operation.
    • Water intrusion
    • Vacuum leak and other unmetered air downstream of the MAF sensor
    • Intake manifold leak
  2. Inspect the exhaust system for the following:
    • Water intrusion
    • Exhaust Leakage
    • Damaged, restricted, modified or enhanced exhaust system.
  3. Inspect the engine mechanical for items that could alter the air flow into the combustion chamber.
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