P0440 on a 2017 Toyota Camry
EVAP System Malfunction (Generic)
P0440 on a 2017 Toyota Camry indicates evap system malfunction (generic). It usually stays drivable short-term but should be diagnosed promptly. The most common cause is loose, worn, or wrong-spec fuel cap (typically $15–$60). Confirm the root cause before replacing parts.
What does P0440 mean on a 2017 Toyota Camry?
P0440 is a generic evaporative emission (EVAP) system fault. The EVAP system captures fuel vapors from the tank and routes them through the charcoal canister to be burned by the engine instead of vented into the atmosphere. P0440 is set when the ECM detects that this sealed system has lost its ability to hold pressure or vacuum during a leak test. It is almost always the first sign of a small leak somewhere between the fuel tank and the engine intake.
This guide covers P0440 across the 2015-2019 Toyota Camry generation — the symptoms, causes, and diagnostic steps below apply to every model year from 2015 through 2019.
Is it safe to drive a 2017 Toyota Camry with P0440?
In most cases a 2017 Toyota Camry stays drivable for short trips with P0440 active, but diagnose and repair it promptly. This is a low-severity code — ignoring it can lead to further damage or a failed emissions test.
What are the symptoms of P0440 on a 2017 Toyota Camry?
- Check Engine Light is illuminated
- Faint fuel smell when filling the tank or shortly after
- No drivability problem in most cases
- Fuel-cap warning light on some vehicles
- Vehicle will fail emissions / smog testing
What causes P0440 on a 2017 Toyota Camry?
| Cause | Likelihood | Estimated repair (USD) |
|---|---|---|
| Loose, worn, or wrong-spec fuel cap Always the first thing to check — costs nothing to tighten or replace. | Most common | $15–$60 |
| Cracked, kinked, or disconnected EVAP hose | Common | $30–$200 |
| Failed EVAP purge valve (purge solenoid) stuck open or closed | Common | $80–$300 |
| Failed EVAP canister vent valve / vent solenoid | Common | $80–$350 |
| Cracked or damaged EVAP charcoal canister | Occasional | $200–$600 |
| Pinhole leak in fuel filler neck or tank seam | Occasional | $150–$800 |
| Failed fuel tank pressure sensor | Occasional | $100–$350 |
How to diagnose this on a 2017 Toyota Camry
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Inspect and re-seat the fuel cap
Remove the fuel cap and check the rubber gasket for damage, debris, or twisting. Reinstall hand-tight until the cap clicks. Many vehicles require 3+ click stops. Clear the code and drive several drive cycles to allow the EVAP monitor to retest.
Tools: None
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Read mode 6 / EVAP monitor data
Pull mode 6 test results for the EVAP system. Look at the small-leak, large-leak, and purge flow test IDs. The specific test that failed narrows the diagnosis from "EVAP system" to which subsystem within it.
Tools: Scan tool with mode 6 support
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Smoke-test the EVAP system
Introduce low-pressure smoke (typically 0.5 psi) into the EVAP service port. Inspect every hose joint, the charcoal canister, the purge and vent solenoids, the filler neck, and the tank top. Smoke escaping anywhere is the leak — repair it and retest.
Tools: EVAP smoke machine, UV dye and light (optional), Inspection mirror
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Bench-test the purge valve and vent valve
Remove the purge valve and apply 12 V across its terminals. It should click and open. With no voltage, it should hold vacuum. The vent valve operates in reverse — normally open, closes when energized. Either valve stuck the wrong way will set P0440.
Tools: 12 V test source, Hand vacuum pump
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Check the fuel tank pressure sensor reading
Compare the live tank pressure PID to a known-good vehicle. A reading that does not change when the cap is removed or when the purge valve is commanded indicates either a failed sensor or a blocked hose to it.
Tools: Scan tool
Known Technical Service Bulletins for the 2015-2019 Toyota Camry
Manufacturers publish Technical Service Bulletins (TSBs) when a known issue affects a specific vehicle. These bulletins come from the NHTSA database for your Toyota Camry.
- ENGINE Feb 13, 2026
This bulletin includes basic procedures for performing a rescue charge on Ni-MH high voltage (HV) batteries. This bulletin should be used in conjunction with the applicable model and model year Repair Manual while performing a rescue charge. The GRX-5100 should be used wherever the Repair Manual references the Toyota Hybrid System (THS) charger.
NHTSA #11029893 - ENGINE Feb 13, 2026
OBSOLETE NOTICE February 13, 2026: This bulletin is now obsolete. Please see T-SB-0009-26.
NHTSA #11029892 - UNKNOWN OR OTHER Jan 7, 2026
Some 2005 – 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Service Bulletin is to provide general guidelines and procedures for odor remediation. This Service Bulletin provides a guide on how to prepare and treat the interior of the vehicle for odor remediation. Refer to the applicable model and model year Repair Manual and the EPA (Environmental Protection Agency) website for the most up-to-date safety and precautionary guidelines.
NHTSA #11028712 - ELECTRICAL SYSTEM Jun 13, 2025
The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant leaks.
NHTSA #11020657 - STRUCTURE Dec 6, 2024
To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust cover. The purpose of the wheel film is to shield the disc brake rotor from weather elements and initial rust before the vehicle is delivered to the customer. Consequently, the film should remain on the wheel for as long as possible.
NHTSA #11012743 - STRUCTURE Dec 6, 2024
The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and remain on a painted vehicle surface, especially the horizonal areas of the hood, roof, and decklid, significant damage can occur. This damage is the result of actual etching of the paint and appears as pitting or water spots. As acid rain droplets on the vehicle surface evaporate, the concentration strength of the acid increases, causing deeper and more rapid damage. This evaporation and corrosive action also occur more rapidly on dark colored cars as direct sun heat increases. It is the dealer’s responsibility to protect and maintain the quality of the vehicle’s paint finish after receipt at the dealership prior to the first sale. In areas known for high frequency and/or concentration of acid rain, frequent vehicle washing during high heat or humidity periods will minimize the potential for paint damage caused by acid rain. It is further recommended that either reverse osmosis or deionized water be used to prevent water spotting.
NHTSA #11012744
+14 more TSBs available in MECH AI's TSB explorer for this vehicle.
NHTSA complaints & recalls for the 2017 Toyota Camry
Owner-reported safety complaints and official recalls filed with the U.S. National Highway Traffic Safety Administration for the 2017 Toyota Camry. Use these to gauge how common a problem is on your specific vehicle before you start chasing Toyota Camry diagnostics.
- VEHICLE SPEED CONTROL 19
- UNKNOWN OR OTHER 31
- AIR BAGS 24
- ELECTRICAL SYSTEM 22
- SERVICE BRAKES 21
3 active recalls
- EQUIPMENT:OTHER:LABELS Jun 2019
Southeast Toyota Distributors, LLC (SET) is recalling certain 2017-2019 Toyota Camry, Corolla, Rav4, Sienna, and Yaris iA vehicles equipped with factory-installed floor mats. The load carrying capacity modification label may be incorrect. As such, these vehicles fail to comply…
NHTSA campaign 19V503000 - AIR BAGS:KNEE BOLSTER Dec 2016
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain model year 2016 Avalon, and 2017 Camry vehicles manufactured August 3, 2016, to September 12, 2016. The front passenger knee air bag module may have been attached to the lower instrument panel with incorrect…
NHTSA campaign 16V906000 - TIRES:TEMPORARY/EMERGENCY SPARE TIRE May 2017
Gulf States Toyota, Inc. (Gulf States) is recalling certain 2017 4Runner , 86, Avalon, Camry, Camry Hybrid, Corolla, Corolla iM, Highlander, Highlander Hybrid, Prius, Prius C, RAV4, RAV4 Hybrid, Sienna and Yaris vehicles. The spare tire air pressure was not adjusted to the prop…
NHTSA campaign 17V295000
How do I fix P0440 on a 2017 Toyota Camry?
- Replace the fuel cap with an OEM spec part
- Replace cracked or aged EVAP hoses
- Replace the EVAP purge valve
- Replace the EVAP vent valve / vent solenoid
- Replace the EVAP charcoal canister
About the 2015-2019 Toyota Camry
The 2015-2019 Toyota Camry was commonly sold with the following powertrains: 2.5L I4, 3.5L V6, 2.5L Hybrid I4. Common trims include LE, SE, XLE, XSE.
P0440 vs the more specific EVAP codes
P0440 is the catch-all. If the ECM can identify the type of failure more specifically, it will set a narrower code: P0442 (small leak), P0455 (large leak), P0446 (vent control), and so on. Older vehicles often set P0440 when newer vehicles would set one of the more specific codes for the same underlying condition.
Why the gas cap is always step one
A loose or damaged gas cap accounts for roughly one-third of all P0440 set events. The cap is the cheapest part to replace and the most common point of failure. Always tighten until you hear 3+ clicks, and replace any cap whose gasket shows cracks or hardening.
How long after a repair until the code clears
The EVAP leak test only runs under specific conditions: cold soak (engine off for several hours), partial fuel tank (typically 25–75 % full), and a specific outside temperature range. After a repair, expect 2–4 drive cycles before the monitor completes and the readiness flag turns “ready.” Clearing the code with a scan tool removes the light immediately, but the monitor must complete naturally before emissions testing will pass.
P0440 on a 2017 Toyota Camry: frequently asked questions
What does diagnostic trouble code P0440 mean on a 2017 Toyota Camry?
P0440 is a generic evaporative emission (EVAP) system fault. The EVAP system captures fuel vapors from the tank and routes them through the charcoal canister to be burned by the engine instead of vented into the atmosphere. P0440 is set when the ECM detects that this sealed system has lost its ability to hold pressure or vacuum during a leak test. It is almost always the first sign of a small leak somewhere between the fuel tank and the engine intake.
What are the symptoms of P0440 on a 2017 Toyota Camry?
Check Engine Light is illuminated. Faint fuel smell when filling the tank or shortly after. No drivability problem in most cases. Fuel-cap warning light on some vehicles. Vehicle will fail emissions / smog testing
What causes P0440 on a 2017 Toyota Camry?
Loose, worn, or wrong-spec fuel cap (most-common). Cracked, kinked, or disconnected EVAP hose (common). Failed EVAP purge valve (purge solenoid) stuck open or closed (common). Failed EVAP canister vent valve / vent solenoid (common). Cracked or damaged EVAP charcoal canister (occasional). Pinhole leak in fuel filler neck or tank seam (occasional). Failed fuel tank pressure sensor (occasional)
Is it safe to drive a 2017 Toyota Camry with P0440?
In most cases a 2017 Toyota Camry stays drivable for short trips with P0440 active, but it should be diagnosed and repaired promptly — this is a low-severity code. Ignoring it can lead to further damage or a failed emissions test.