P0455 means the EVAP monitor could not create or retain expected pressure; it does not locate the opening. Record cap position, fuel level, FTP data and recent tank work, then prove purge/vent valve sealing and use EVAP-safe smoke. Honda bulletin 14-010 covers 2012 CR-V except Japan-built vehicles and narrow early-production 2013 2WD/AWD VIN ranges. It identifies excess cap-gasket friction that can keep the cap from sealing and calls for inspection/replacement when matched. It is not a universal cap answer for every CR-V.
Match the symptom
Select the closest observation. The result changes the first test; it does not name a part to replace.
Record cap's found condition before tightening.
What can set P0455—and how to separate it
The order below is evidence-driven, not a universal probability ranking. Vehicle year, repair history, companion codes and the operating condition in freeze frame change where diagnosis should begin.
| Possible cause | Evidence that supports it | First useful test |
|---|---|---|
| Cap not sealed/damaged/wrong | Found condition or cap/filler test fails | Cap and neck inspection |
| 14-010 cap-gasket friction branch | Exact 2012–2013 VIN/build match | Bulletin inspection |
| Purge valve stuck open | Vacuum passes when commanded closed | Closed-state sealing test |
| Vent valve/hose/canister leak | Cannot seal; smoke localizes escape | Command and smoke test |
| Tank/pump seal or FTP bias | Recent service or pressure signal implausible | Sectional leak and signal test |
Build origin changes the bulletin branch
Honda explicitly excluded Japan-built 2012 CR-Vs and listed separate 2013 VIN ranges.
Year and model alone are insufficient for applying 14-010.
A valve can imitate a large hole
Purge and vent passages are supposed to close during portions of the test.
A valve held open lets pressure escape without a cracked tank.
The cap's condition is evidence
Note whether it was loose, cross-threaded or felt sticky before changing it.
Also inspect the filler sealing surface; a correct cap cannot seal damage beneath it.
Save these scan-data clues
Freeze frame is a snapshot of conditions when the PCM matured the fault. It can distinguish an idle-only problem from a load, cold-start or monitor-completion problem. Clearing first throws that context away.
- Fuel level, ambient and soak temperature
- FTP sensor data
- Purge/vent commands
- P0456/P0441/circuit companions
- Cap condition and recent refuel
- VIN/build plant and tank service
A practical diagnostic workflow
- 01Preserve cap evidence
Tightening first removes the most perishable clue.
- 02Check bulletin applicability
Build origin and published 2013 VIN cutoffs matter.
- 03Prove valve sealing
A solenoid click does not prove it closes.
- 04Apply regulated smoke
Inspect filler, hoses, canister and top-of-tank seals.
- 05Validate FTP response
A biased sensor can report a leak in a sealed system.
- 06Complete EVAP monitor
Meet fuel/soak conditions and check pending status.
Do not replace a cap and canister together. Bulletin 14-010 is limited to specified 2012–2013 production and its cap-friction condition. A disconnected pump seal or leaking purge valve needs a different repair.
Why the model year changes the test
CR-V diagnostics span the first-generation B20, K24-powered second through fourth generations, 1.5L turbo and 2.4L fifth-generation versions, newer 1.5L turbo models and 2.0L hybrid systems. AWD does not create another engine bank, but engine management, direct injection, turbo plumbing, EVAP packaging, VTEC oil hardware and hybrid operating modes change. Confirm the VIN, market, engine, build plant, emissions label and current Honda campaign status before selecting a flowchart or part.
- 2012 CR-V coverage excludes Japan-produced vehicles in 14-010.
- 2013 coverage is limited to published early 2WD/AWD VIN ranges.
- 1998–2001 P1456/P1457 logic should not be mixed with later P0455 systems.
- Later generations may use revised capless/filler and canister layouts.
P0455 FAQ
Is P0455 always a gas cap?+
No. Valves, hoses, canister, tank seals and sensing can cause it.
Does 14-010 cover every 2013 CR-V?+
No. It lists early-production VIN ranges.
Can I drive?+
Usually briefly without odor or liquid fuel.
Can purge leakage cause hard starting?+
Yes, especially after refueling.
Can I use shop air?+
Not unregulated; use EVAP-safe low pressure.
Why did a new cap not fix it?+
The leak/valve may be elsewhere or the filler surface damaged.
Why is readiness incomplete?+
Fuel level, soak and temperature gate the monitor.
What confirms repair?+
Correct sealing/FTP response and completed monitor.
Ford diagnostic references
These documents explain Ford monitor operation. Exact pinpoint tests, connector views and specifications must be selected for the truck's VIN and model year in current service information.
01Honda Service Bulletin 14-010 — 2012–2013 CR-V P0455/P0456Lists 2012 CR-V except Japan-built vehicles plus specific early 2013 VIN ranges; cap-gasket friction branch↗02Honda ServiceExpressHonda VIN-specific service information, DTC flowcharts, wiring and service publications↗03Honda Owners — CR-V manualsOfficial model-year warnings, fuel, maintenance and operating information↗