P1441

Schematic:

Once every drive cycle, the EVAP system runs a 25-40 second diagnostic where it monitors possible leaks, the fuel tank pressure sensor, vent valve, and canister purge valve. This diagnostic has five phases and can set several different codes depending on which part of the diagnostic fails. This code can set in the 2nd phase if tank pressure falls while the vent and purge valves are both commanded shut. It will also set in the 4th phase if the pressure falls below a calibrated value too quickly. This code indicates that the purge value is stuck open.

DTC PARAMETERS
DTC 1441 will set when:
^ Vehicle Speed = 0 mph
^ Engine Speed = Idle
^ Fuel system in closed loop
^ Battery Voltage great than 11.05 volts
^ Engine Run Time greater than 1 min. 45 sec.
^ Altitude less than 9000 ft.
^ Fuel level between 1.8 and 14 gal
^ No TP, ECT, VSS, Tank pressure, oxygen sensor, idle control, purge valve, vent valve, battery voltage, misfire or EGR codes set

DTC P1245 is a (type B) DTC.

DIAGNOSTIC AIDS
Possible causes:
^ EVAP purge solenoid stuck open
^ EVAP purge solenoid circuit 426 intermittently shorted to ground or ECM intermittently shorted to ground internally on that circuit.

NOTE: If DTC P0455 is set, diagnose it first.