Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMITSUBISHI2005LANCER L4-2.0L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSENGINE CONTROLS - DTC P0441
2005 Mitsubishi Lancer L4-2.0L SOHC
Engine Controls - DTC P0441
2005 Mitsubishi Lancer L4-2.0L SOHCSECTION Engine Controls - DTC P0441
SOURCE: Mitsubishi Tech Talk Article December 2004
TITLE: DIAGNOSING DTC P0441
APPLIES TO: ALL
SERVICE TIP:
Evaporative Emission Control System Incorrect Purge Flow
SYSTEM OPERATION
DTC P0441 sets when the negative fuel tank pressure is below -2.0 kPa (-0.6 inHg) during normal driving. During driving, fuel tank pressure is monitored continuously by the OBD-II system EVAP monitor as the PCM closes the purge and vent solenoids.
ids.
The most likely reason for DTC P0441 to set during the EVAP monitor is due to a blockage or restriction on the vent side of the system (in a hose, vent valve, or frame where a hose vents). Since the fuel tank pressure sensor is continuously monitored, whenever the fuel tank pressure sensor reads below -2 kPa (-0 .6 inHg), DTC P0441 will set.
TITLE: DIAGNOSING DTC P0441
APPLIES TO: ALL
SERVICE TIP:
Evaporative Emission Control System Incorrect Purge Flow
SYSTEM OPERATION
DTC P0441 sets when the negative fuel tank pressure is below -2.0 kPa (-0.6 inHg) during normal driving. During driving, fuel tank pressure is monitored continuously by the OBD-II system EVAP monitor as the PCM closes the purge and vent solenoids.
ids.
The most likely reason for DTC P0441 to set during the EVAP monitor is due to a blockage or restriction on the vent side of the system (in a hose, vent valve, or frame where a hose vents). Since the fuel tank pressure sensor is continuously monitored, whenever the fuel tank pressure sensor reads below -2 kPa (-0 .6 inHg), DTC P0441 will set.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.