AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Toyota - P0440 Toyota

P0440 Toyota Code - Evaporative Emission Control System Malfunction

- Code Popularity: 154,797 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P0440 Toyota?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other 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
⚠ Does your Toyota have Safety Recalls? → Check here

How to Fix the DTC P0440 Toyota?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code 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 combined 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





User Submitted Video

Search for P0440 Toyota Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0440 Toyota code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

Malfunction is detected when EVAP control system has a leak, EVAP control system does not operate properly.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • A noticeable fuel odor may result from fuel vapor release

Code 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.
OBDII Code P0440 Toyota - Evaporative Emission Control System Malfunction - AutoCodes.com
P0440 Toyota Code - Evaporative Emission Control System Malfunction

Need More Information on the Code?

Need more information on how to fix the P0440 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0440 Toyota code diagnosed by a professional: Find a repair shop in your area

Code P0440 Toyota comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0440 Toyota code? Have you replaced any parts?
Any information is appreciated. Thanks