Honda CR-V P0455
TL;DR
P0455 is a large EVAP leak on the CR-V. The top cause by far is the fuel cap (loose, worn seal, or not clicked shut), followed by the EVAP purge or vent valve and cracked EVAP hoses.
Why P0455 shows up on the Honda CR-V
The CR-V's EVAP system seals the fuel tank and routes fuel vapor through a charcoal canister so it can be burned in the engine instead of venting to the air. P0455 is set when the computer runs a leak-detection test and sees pressure or vacuum bleeding off faster than a large hole would allow. On this SUV the single most reported trigger is the fuel filler cap not being sealed after refueling, which is why Honda often prints a cap reminder near the gauge cluster.
Model-typical causes and rough likelihood
- Fuel cap loose, cross-threaded, or worn seal - commonly the cause, roughly half of CR-V P0455 cases.
- EVAP vent valve or purge valve stuck open - frequently reported, often after mud or dust exposure on the canister-side vent valve.
- Cracked or disconnected EVAP hose / canister - less common but seen on higher-mileage CR-Vs, especially rubber lines that harden with age.
- Damaged fuel filler neck or seal - occasional, sometimes after a minor rear impact.
Owner tips before paying for diagnosis
Remove the gas cap, wipe the sealing ring, check for cracks, and re-tighten until it clicks at least three times. Drive for a day or two through several start-stop cycles so the CR-V can re-run the EVAP monitor. If the light clears on its own, the cap was the culprit. If it returns, have a shop perform an EVAP smoke test to pinpoint the leaking valve or hose rather than replacing parts by guesswork.
Summary
| Code | P0455 |
|---|---|
| Meaning | EVAP system large leak detected |
| Severity | Low |
| Can I drive? | Yes, safe to keep driving |
| Most common cause | Loose or worn fuel cap |
| Typical repair cost | $15-$40 cap; $120-$600 valve/hose |
Full diagnostics
For the complete step-by-step diagnostic and repair guide, see P0455 — full diagnostics.
Frequently asked questions
Is it safe to drive my Honda CR-V with a P0455 code?
Yes. P0455 is a low-severity emissions code on the Honda CR-V and does not affect the engine, transmission, or safety of the vehicle. You can drive normally. The only practical downsides are a lit check-engine light and the fact that the car may fail an emissions or smog test until the EVAP leak is repaired, so fix it before any inspection.
What is the most common cause of P0455 on a Honda CR-V?
By far the most common cause of P0455 on a Honda CR-V is the fuel filler cap - either left loose after refueling, not clicked fully shut, cross-threaded, or fitted with a worn rubber seal. Because it is a large-leak code, an unsealed cap alone will trigger it. Tightening or replacing the cap resolves a large share of cases before any deeper diagnosis is needed.
How much does it cost to fix P0455 on a Honda CR-V?
On a Honda CR-V, a replacement fuel cap costs roughly $15 to $40 and often solves P0455 entirely. If the fault is a stuck EVAP vent or purge valve, expect about $120 to $300 including parts and labor. Cracked EVAP hoses or a canister replacement run higher, roughly $250 to $600 depending on the part and shop rates.