This diagnostic procedure supports the following DTC:
DTC P1400 Cold Start Emission Reduction Control System
Inspect the air intake system for the following:
Modified, damaged, or restricted
Dirty or deteriorating air filter element
Crankcase ventilation system for correct operation.
Vacuum leak and other unmetered air downstream of the MAF sensor
Intake manifold leak
Inspect the exhaust system for the following:
Damaged, restricted, modified or enhanced exhaust system.
Inspect the engine mechanical for items that could alter the air flow into the combustion chamber.
Monday, June 7th, 2010 AT 10:53 PM