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Error Code P1441 is defined as EVAP System Flow During Non-Purge Condition.
This error code is a manufacturer-specific trouble code, meaning it does not apply to all vehicles makes. Rather, it applies only to specific vehicle makes, such as GM (Chevrolet/GMC), Nissan, Pontiac, etc. Specification of the definition, troubleshooting, and repairs still vary from one make and model to another.
The PCM (powertrain control module, also known as ECM or engine control module) monitors the amount of vacuum or pressure in the EVAP (evaporative emission control system) by monitoring the fuel tank pressure signal. The PCM then seals the EVAP system by sending a command to the EVAP Purge Control Solenoid Off and the EVAP vent valve On. The PCM will monitor the fuel tank pressure sensor to determine if the EVAP Purge Solenoid is leaking vacuum to the EVAP system.
As with other error codes, this code activates the Check Engine light and registers the code to the vehicle’s memory system. Other possible symptoms include noticeable fuel odor caused by the release of fuel vapors.
The most common cause of this error code is bad purge solenoid or bad pressure sensor on top of the gas tank.
How to Check
Many times the purge solenoid can go bad, and to diagnose it, technicians use a scan tool and an EVAP cart to monitor and pressurize the system correctly.
How to Fix
The easiest fix for this code is to replace the purge solenoid and have an authorized technician clear the code. To remove the purge solenoid from the intake, they have to disconnect the purge solenoid electrical connector first, then remove the purge solenoid retaining bolts before they can remove the purge solenoid from the intake manifold.
To test further, take a test light and go from one terminal of the purge solenoid to another on a warm engine. Start from the dark green or white wire to battery voltage with the test light. The engine must be running while doing these checks. Also, disconnect the purge electrical connector before testing.
It gets very technical from here, so if you’re not confident about your knowledge of the EVAP system, then it’s best to let a professional technician do the job.