P0440 on Dodge
Evaporative Emission Control System Malfunction
P0440 on Dodge vehicles indicates evaporative emission control system malfunction. Au7o has documented this code across 1 Dodge model — most commonly on Journey. 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 Dodge range from $500 to $1,800, 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 Dodge by Model
Dodge Journey(1 issue)
- AC Compressor Failure and Evaporator Leaks2009-2020
AC compressor fails due to inadequate lubrication, leaky seals, and internal mechanical failure. Evaporator develops leaks from age and moisture. Condenser prone to damage from road debris. Lack of lubrication from leaks causes compressor seizure.
Looking for P0440 on a different make?
View P0440 across all makes →Frequently Asked Questions
What does P0440 mean on Dodge?▼
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 Dodge specifically, this code is documented across 1 model.
What causes P0440 on Dodge vehicles?▼
Common causes on Dodge: 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 Dodge?▼
Repair costs on Dodge range from $500 to $1,800, depending on the specific model and root cause.
Which Dodge models have P0440 documented?▼
Au7o has documented P0440 on 1 Dodge model: Journey.