Evaporative Emission Control

Evaporative Emission Control System Malfunction

Evaporative Emission Control System Malfunction


The error code P0440 is associated with an evaporative emission control system malfunction. It indicates that there is a part of the EVAP control system not functioning as it should. The EVAP system is comprised of different parts which include the gas cap, carbon canister, fuel lines, purge valve or any other hoses. The EVAP discharge control system prevents the escape of…


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Evaporative Emission Control System Incorrect Purge Flow

Evaporative Emission Control System Incorrect Purge Flow


The code P0441 means that the Evaporative control system purge flow is incorrect. First, let s quickly review what the Evaporative control system is. The Evaporative control system (EVAP) prevents gasoline vapors from the fuel tank from escaping into the atmosphere. The Evaporative control system catches and stores gasoline vapors in a small box installed near the fuel tank…


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Evaporative Emissions Control System Pressure Sensor

Evaporative Emissions Control System Pressure Sensor


Evaporative Emissions Control System Pressure Sensor High Input What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that is applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model. The EVAP (Evaporative Emissions) System allows fuel tank vapors to be purged into the engine…


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Evaporative Emission Control System Leak

Evaporative Emission Control System Leak


What does P0442 code mean? Evaporative Emission Control System Leak Detected (Small Leak) - In a sentence, this is the code recorded in the your car s computer when it sees a small to medium sized leak in the system. Since your evaporative emissions system (You can read more about this at my tutorial for code P0440) is comprised of long hoses, there are many places that it…


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Evaporative Emission System Vent Control Circuit

Evaporative Emission System Vent Control Circuit


Evaporative Emission Control System Vent Control Circuit Malfunction What does that mean? Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM s driver controls the ground, and when grounded, activates the valve (closing…


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Evaporative Emission Control System Leak Detected

Evaporative Emission Control System Leak Detected


Missing or loose fuel cap - Incorrect fuel filler cap used - Fuel filler cap remains open or fails to close - Foreign matter caught in fuel filler cap - EVAP canister or fuel tank leaks - EVAP system hose leaking - Fuel tank leaking Tech notes The P0455 it’s a very common code, because the code is set if the gas cap is loose or missing. Start by tighten the gas cap and clearing…


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P0443 Evaporative Emission Control System

P0443 Evaporative Emission Control System


Article by Dale Toalston ASE Certified Technician OBD-II Trouble Code Technical Description Evaporative Emission Control System Purge Control Valve Circuit What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that is applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model…


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