P0440 on Chrysler
Evaporative Emission Control System Malfunction
P0440 on Chrysler vehicles indicates evaporative emission control system malfunction. Au7o has documented this code across 1 Chrysler model — most commonly on 300. This code indicates a general malfunction in the Evaporative Emission Control (EVAP) system, which captures fuel vapors from the gas tank and routes them to be burned by the engine instead of escaping into the air. The computer ran a self-test and detected the sealed vapor system isn't holding pressure or vacuum correctly, often signaling a leak somewhere in the system. The most frequent and easiest cause is a loose or faulty gas cap. The car will run normally, but it will fail an emissions test and may smell faintly of fuel. Typical repair costs on Chrysler range from $20 to $500, depending on the specific model and root cause.
Common Causes of P0440
- •Loose, damaged, or missing gas cap
- •Cracked or disconnected EVAP hose
- •Faulty purge valve/solenoid
- •Faulty vent valve/solenoid
- •Leaking charcoal canister
- •Damaged fuel tank filler neck or seal
- •Faulty leak detection pump or pressure sensor
P0440 on Chrysler by Model
Chrysler 300(1 issue)
- EVAP System Small Leak (P0456)2011-2023
Evaporative emission control system develops small leaks triggering P0456 code. Most commonly failed gas cap, chaffed EVAP purge pipe harness, or failed purge solenoid. Triggers check engine light and prevents emissions testing pass.
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View P0440 across all makes →Frequently Asked Questions
What does P0440 mean on Chrysler?▼
P0440 stands for "Evaporative Emission Control System Malfunction." This code indicates a general malfunction in the Evaporative Emission Control (EVAP) system, which captures fuel vapors from the gas tank and routes them to be burned by the engine instead of escaping into the air. The computer ran a self-test and detected the sealed vapor system isn't holding pressure or vacuum correctly, often signaling a leak somewhere in the system. The most frequent and easiest cause is a loose or faulty gas cap. The car will run normally, but it will fail an emissions test and may smell faintly of fuel. On Chrysler specifically, this code is documented across 1 model.
What causes P0440 on Chrysler vehicles?▼
Common causes on Chrysler: Loose, damaged, or missing gas cap, Cracked or disconnected EVAP hose, Faulty purge valve/solenoid, Faulty vent valve/solenoid, Leaking charcoal canister. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0440 on a Chrysler?▼
Repair costs on Chrysler range from $20 to $500, depending on the specific model and root cause.
Which Chrysler models have P0440 documented?▼
Au7o has documented P0440 on 1 Chrysler model: 300.