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P0440 Toyota

P0440 Toyota - Evaporative Emission Control System Malfunction

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P0440 Toyota Comments |  Add Comment
Possible causes
- 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
Help with Possible causes What does this mean?
Tech notes
The P0440 code means that the control module has detected a leak in the Evaporative Emission (EVAP). Loose fuel tank filler cap is the most common cause that triggers the P0440 code.

There is a factory service bulletin for the following Toyota models:

2003–2004 Toyota Corolla
2003–2005 Toyota Matrix
Toyota Factory Service Bulletin OBDII Code P0440 Corolla and Matrix

If P0440 is combine with P0446 and P0441 use this bulletin:
2000-2003 Toyota Solara
2000-2003 Toyota Avalon
2000-2003 Toyota Camry
2001-2003 Toyota Sienna
Toyota Factory Service Bulletin OBDII Code P0440 Solara, Avalon, Camry, Sienna
Help with Tech Notes What does this mean?
When is the code detected?
Malfunction is detected when EVAP control system has a leak, EVAP control system does not operate properly.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors
P0440 Toyota Description

The Engine Control Module (ECM) tests the Evaporative Emission (EVAP) system for the following conditions:

- Large and small leaks

- Excess vacuum

- Purge flow during non-commanded conditions

- Fuel Level and Fuel Pressure sensor faults

- EVAP Purge and Vent Valve faults

The ECM monitors the Fuel Tank Pressure sensor in order to determine the level of vacuum/pressure in the EVAP system. The ECM commands both the EVAP Purge Solenoid and the EVAP Vent Valve ON when the conditions are met in order to apply an engine vacuum to the EVAP system. The ECM commands the EVAP Purge Solenoid OFF once the system has reached a predetermined level of vacuum. This test verifies if a vacuum can be achieved in the EVAP system. Failure to develop a vacuum may be caused by a large leak or a restriction.

TOYOTA Technical Service Bulletins for P0440 code
2002 TOYOTA CAMRY Engine And Engine Cooling:engine Details
2003 TOYOTA CAMRY Engine And Engine Cooling:engine Details
2002 TOYOTA CAMRY 061000 Engine And Engine Cooling:engine Details
2003 TOYOTA CAMRY 061000 Engine And Engine Cooling:engine Details
2000 TOYOTA AVALON Engine And Engine Cooling:engine Details
2000 TOYOTA AVALON Engine And Engine Cooling:engine Details
2000 TOYOTA CAMRY Engine And Engine Cooling:engine Details
2000 TOYOTA CAMRY Engine And Engine Cooling:engine Details
2000 TOYOTA CAMRY SOLARA Engine And Engine Cooling:engine Details
2000 TOYOTA CAMRY SOLARA Engine And Engine Cooling:engine Details
More Bulletins Help with Technical Service Bulletins What does this mean?
P0440 Toyota Information for specific Toyota models
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