2022 Acura Integra P0440 EVAP Code: Diagnosis, Causes & Repair Guide

Investigating the P0440 Code on Your 2022 Acura Integra

The P0440 code on your 2022 Acura Integra indicates the Powertrain Control Module (PCM) has detected a malfunction in the evaporative emission control (EVAP) system. The revived Integra, sharing its platform and 1.5-liter turbocharged engine with the Honda Civic, uses Honda/Acura's proven EVAP architecture.

The Integra's EVAP System

Your 2022 Integra with the 1.5L turbo four-cylinder uses Honda/Acura's EVAP components:

• Purge Control Solenoid Valve (PCSV) — Honda/Acura's purge valve controlling fuel vapor flow from the canister to the turbo engine's intake manifold
• Bypass Solenoid Valve — Honda-specific component managing vapor flow routing within the EVAP system
• Canister Vent Shut Valve — Seals the charcoal canister during system leak tests
• Charcoal Canister — Stores fuel vapors using activated carbon
• FTP (Fuel Tank Pressure) Sensor — In-tank pressure monitoring for leak detection
• Fuel Filler Cap — Twist-on with rubber gasket

Ranked Suspects

1. Gas Cap Seal (30% of cases) — Gasket wear after 2–3 years of use. Cost: $12–$25.
2. Purge Control Solenoid Valve (PCSV) (24%) — Most common mechanical failure on Honda/Acura vehicles. The turbo engine's heat accelerates wear. Cost: $30–$65, $100–$230 with labor.
3. Bypass Solenoid Valve (16%) — Honda-specific component failure. Cost: $35–$75, $110–$245 with labor.
4. Canister Vent Shut Valve (13%) — Sealing failure during leak tests. Cost: $35–$70, $100–$235 with labor.
5. EVAP Hose Issues (10%) — Heat from the turbo engine and age. Cost: $10–$30, $70–$175 with labor.
6. FTP Sensor (4%) — In-tank sensor malfunction. Cost: $45–$95, $115–$250 installed.
7. Charcoal Canister (3%) — Saturation from fuel overfilling. Cost: $80–$200, $170–$350 installed.

Diagnostic Steps

1. Gas Cap — Inspect gasket, clean filler neck, reseat firmly. Clear code and monitor for 2–3 drive cycles.
2. Companion Codes — P0441, P0442, P0446, P0497 (Honda-specific low purge flow). These narrow the investigation significantly.
3. PCSV Test — Locate in the engine bay. Apply 12V to test — it should click and hold vacuum when energized.
4. Bypass Solenoid — Test using Honda HDS or compatible diagnostic tool to command and verify.
5. Smoke Test — $80–$150 for definitive leak detection.

Warranty and DIY

Warranty: Acura's 4-year/50,000-mile basic warranty may still cover your 2022 Integra. The 6-year/70,000-mile powertrain warranty extends further. Verify with your dealer.

For DIY, the Integra's Civic-based layout is well-organized for engine bay work. The PCSV is accessible from the top.

The Verdict

Your 2022 Integra's P0440 is most likely a gas cap or PCSV issue. The Civic-based platform is proven and reliable — this is a one-time fix. Check warranty coverage for a potential free repair.