DTC P1441 - EVAP EMISSIONS SYSTEM FLOW DURING NON-PURGE Pontiac Firebird IV

Note. For circuit reference, see the appropriate WIRING DIAGRAMS article. For connector and terminal identification, see CONNECTOR IDENTIFICATION .

Circuit Description

Evaporative (EVAP) emission system includes following components: fuel tank, EVAP vent solenoid, fuel tank pressure sensor, fuel pipes and hoses, vapor lines, fuel cap, EVAP emission canister, purge lines, and EVAP purge solenoid.

A leaking purge solenoid, EVAP purge and engine vacuum lines switched at EVAP purge solenoid, or EVAP purge solenoid driver circuit shorted to ground, will set DTC P1441.

Conditions required to set DTC are

1. No IAT, MAP, ODM or TP sensor DTCs set.
2. DTC P0442 diagnostic test has passed.
3. A continuous open purge flow condition is detected during diagnostic test.