Tracking P0441 in Your Acura Integra
Your Acura Integra — the sport compact that revived a legendary nameplate — has triggered P0441 for incorrect EVAP purge flow. Powered by a 1.5-liter turbocharged four-cylinder (200 hp) with either a CVT or 6-speed manual, the Integra shares its platform and Honda EVAP architecture with the Civic. P0441 means the PCM detected abnormal fuel vapor purge flow during its self-test.
Symptoms You Might Notice
- Steady check engine light
- Normal turbo power and rev behavior
- No transmission issues (CVT or manual)
- Possible subtle fuel smell
- Emissions test failure
Common Causes — Ranked
1. Bypass Solenoid Valve
Honda/Acura's bypass solenoid valve (purge valve) controls vapor flow into the turbocharged intake. The 1.5T engine's boost cycling can expose early defects or cause premature wear on the valve.
2. PCM Software Calibration
As a relatively new model, Honda/Acura may have software updates that refine EVAP monitor parameters for the Integra's platform. Your dealer checks using Honda HDS.
3. Canister Vent Shut Valve
The vent shut valve near the charcoal canister can have early defects or environmental exposure damage.
4. Gas Cap Seal
A simple O-ring issue — try replacing the gas cap ($15–$30) before pursuing more expensive diagnosis.
Diagnostic Steps
- Check gas cap — tighten or replace
- Scan with Honda HDS for codes and TSBs
- Test bypass solenoid valve actuation
- Smoke test if needed
Repair Cost Breakdown
- Under warranty: $0 (expected)
- Bypass solenoid valve: $120 – $270
- Canister vent shut valve: $110 – $260
- Gas cap: $15 – $30
Can I Drive With P0441?
Yes. Your Integra's turbo engine, transmission (CVT or manual), and all driving features work normally. P0441 is emissions-only.
DIY vs Professional
Your Integra should be within Acura's 4-year/50,000-mile warranty. Take it to the dealer for a free repair. The Integra shares its Civic platform, so parts are affordable if you ever need to DIY — the bypass solenoid runs $30–$60 online.