P1440 on Acura
EVAP Canister Purge System Small Leak (Positive Pressure)
P1440 on Acura vehicles indicates evap canister purge system small leak (positive pressure). Au7o has documented this code across 1 Acura model — most commonly on ILX. Nissan's ECM pressurizes the EVAP system and monitors the fuel tank pressure sensor for decay. P1440 indicates a leak or malfunction in the canister purge system detected under positive pressure. Driveability is normally unaffected but the vehicle will fail an emissions test. Typical repair costs on Acura range from $2,000 to $4,000, depending on the specific model and root cause.
Common Causes of P1440
- •Loose or failed fuel filler cap
- •Cracked or disconnected EVAP hoses
- •Failed EVAP canister vent control valve
- •Failed EVAP canister purge volume control valve
- •Failed fuel tank pressure sensor
- •Cracked charcoal canister
P1440 on Acura by Model
Acura ILX(1 issue)
- IMA Hybrid Battery Module Degradation and Failure (2013-2014 ILX Hybrid, 1.5L)2013-2014
The ILX Hybrid used the Civic Hybrid's Integrated Motor Assist system - a 1.5L engine with a thin motor-generator between engine and CVT and a nickel-metal-hydride IMA battery pack. It sold in tiny numbers for only two model years and was dropped after 2014. The IMA pack degrades: individual cell sticks fall out of balance, capacity drops, the state-of-charge display swings wildly from full to empty, assist and regen are cut, and the IMA warning light and check engine light illuminate. Acura acknowledged the pattern with Service Bulletin 12-012 (revised June 2015) establishing an IMA Battery Exchange Program covering ILX (and RLX Sport Hybrid) IMA batteries for any internal failure requiring module disassembly - explicitly including out-of-warranty vehicles. Owners also report a second, separate problem: repeated 12V accessory battery failures and no-crank conditions, which on an IMA car is often a symptom of the hybrid system not charging the 12V properly rather than a bad 12V battery.
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View P1440 across all makes →Frequently Asked Questions
What does P1440 mean on Acura?▼
P1440 stands for "EVAP Canister Purge System Small Leak (Positive Pressure)." Nissan's ECM pressurizes the EVAP system and monitors the fuel tank pressure sensor for decay. P1440 indicates a leak or malfunction in the canister purge system detected under positive pressure. Driveability is normally unaffected but the vehicle will fail an emissions test. On Acura specifically, this code is documented across 1 model.
What causes P1440 on Acura vehicles?▼
Common causes on Acura: Loose or failed fuel filler cap, Cracked or disconnected EVAP hoses, Failed EVAP canister vent control valve, Failed EVAP canister purge volume control valve, Failed fuel tank pressure sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1440 on a Acura?▼
Repair costs on Acura range from $2,000 to $4,000, depending on the specific model and root cause.
Which Acura models have P1440 documented?▼
Au7o has documented P1440 on 1 Acura model: ILX.