here is whats listed for the p1441 code

Circuit Description
Canister purge is controlled by a solenoid valve that allows manifold vacuum to purge the canister. The powertrain control module (PCM) supplies a ground to energize the solenoid valve (purge "ON "). The EVAP purge solenoid control is pulse-width modulated (PWM) or turned "ON " and "OFF " several times a second. The duty cycle (pulse width) is determined by engine operating conditions including load, throttle position, coolant temperature and ambient temperature. The duty cycle is calculated by the PCM and the output is commanded when the appropriate conditions have been met.


Conditions for Setting the DTC


No active ECT sensor, IAT sensor, MAP sensor, or TP sensor DTCs set.
BARO reading is above 85 kpa .
Engine coolant temperature is below 70�C (158�F) .
Start-up intake air temperature (IAT) and start-up engine coolant temperature (ECT) are both above 5�C (41�F) .
The difference between start-up ECT and start-up AT is less than 25�C (45�F) .
TP sensor indicates a throttle position above 12% .
Battery voltage is between 11.5 Volts and 16 Volts .
Engine speed is between 800 and 6,000 RPM .
Canister purge duty cycle is below 3% . All conditions are present for at least 3 seconds .
Action Taken When the DTC Sets


The PCM will illuminate the malfunction indicator lamp (MIL) after the second consecutive trip in which the fault is detected.
The PCM will store conditions which were present when the DTC was set as Freeze Frame and in the Failure Records data.
Conditions for Clearing the MIL/DTC


The PCM will turn the MIL "OFF " on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present.
A history DTC P1441 will clear after 40 consecutive warm-up cycles have occurred without a fault.
DTC P1441 can be cleared by using the Tech 2 "Clear Info" function or by disconnecting the PCM battery feed.


Diagnostic Aids
Check for the following conditions:

Poor connection at PCM - Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal-to-wire connection.
Damaged harness - Inspect the wring harness for damage. If the harness appears to be OK, observe the EVAP vacuum switch display on the Tech 2 while moving connectors and wiring harnesses related to the sensor. A change in the display will indicate the location of the fault.
Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.




The canister purge vacuum switch is normally closed when no vacuum (purge) is present. With the ignition "ON " and the engine "OFF " there shouldn't be any vacuum (purge) present in the EVAP system.
Determines if the PCM is able to control the EVAP purge solenoid valve.
Determines if the DTC will set under the conditions present when the DTC was originally stored. If not, the fault is intermittent.
Checks for a grounded EVAP purge solenoid driver circuit, a faulty EVAP vacuum switch, or a leaking EVAP purge solenoid valve.