Posting this stuff from the FSM again since this code seems to be common and these possibilities should be checked. This code happens in boost. Obvious thing would be to check for a boost leak. See this link also:
http://www.dodge-dart.org/forum/eurocompulsion/30261-boost-leak-fix-evap-operations-p1cea-code.html
PURGE FLOW MONITOR IN BOOST: Turbocharged engines purge while the engine is in boost. This is achieved by having additional purge hoses and Hardware. The Boost purge monitor is used to check that this part of the Evaporative emissions system is correctly operating. The Purge flow monitor in boost is enabled to run this trip the exact same way as Purge Flow Monitor.
•The Turbo Purge Monitor will only go intrusive on this trip after a small leak passing event.
•The Monitor will only run when there is a sustained stable boost condition and not when the vehicle is at wide open throttle.
•The Monitor waits a calibrated time while stabilized boost is achieved, it then turns on the OBD Bypass Valve (also called the lower purge control valve) to relieve vacuum only. It then turns on the purge and the monitor looks for only a phase 1 decrease in vacuum in the fuel tank. If the vacuum cannot be achieved the monitor fails. (P1CEA)
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When Monitored and Set Conditions
When Monitored: This diagnostic runs when the following conditions are met:
•With the ignition engine running during a boost condition.
•Fuel level above 12 percent.
•Ambient temperature between 4.0°C and 35°C (39.2°F and 95°F).
•Vehicle speed between 8 km/h and 128.7 km/h (5 mph and 80 mph).
Set Conditions:
•The Powertrain Control Module (PCM) detects insufficient vapor flow detected in the evaporative system operation during a boost condition.
Acronyms in the chart:
FTP = fuel tank pressure
CAC = charge air cooler
