P1441

Diagnostic Chart:

Schematic:

The EVAP control system checks for conditions that cause the EVAP system to purge continuously by commanding the canister vent solenoid On and the EVAP purge solenoid Off (canister vent solenoid closed and purge valve to 0% duty cycle). If fuel tank vacuum level increases during the Service Bay Test, a continuous purge flow condition is indicated. A "stuck open" or leaking purge solenoid will cause the P1441 DTC to set.

DTC PARAMETERS
DTC P1441 will set when a continuous purge flow condition (fuel tank pressure is less than 2.0 volts) is detected during diagnostic test for 75 seconds and the following conditions are met:
^ Baro is greater than 75 kPa.
^ Engine is running.
^ Both ECT and IAT are between 4°C (39°F) and 30°C (86°F) at engine start up.
^ Throttle angle is between 7% and 35%.
^ Vehicle speed is less than 113 km/h (70 mph).
^ ECT is not more than 8°C (14°F) greater than IAT at startup.
^ Fuel tank level is between 15% and 85%.
^ DTCs P0105, P0107, P0108, P0112, P0113, P0117, P0118, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0452, P0453, P0502, P0503, P0601, P0602, P1133 and P1621 are not set.

DIAGNOSTIC AIDS
Although the DTC is considered a Type A code, it acts like a Type B diagnostic under certain conditions. Whenever this diagnostic reports the system passed, or if the battery is disconnected, the diagnostic must fail twice before setting a DTC P1441. The initial fail is not reported or displayed on the Scan tool. A passing system will always report immediately. Inspect for foreign material or debris holding the valve open.

Command EVAP system seal and monitor fuel tank pressure. Voltage will rise if purge is occuring.