Owner's book · not a shop

Open Hood

Know the car. Then the window. Factory specs in plain English — don't authorize until you can say this at the counter.

No car yet Try the demo · 2003 Honda Accord

Owner tools

Lab desks

No dongle required

Type the code

Any $20 scanner. Five characters. We write what it means and what to ask before parts. iPhone Safari has no Web Bluetooth — type the code.

Park first · Mode 03

ELM327

Checking whether this browser can open Web Bluetooth.

P0455

EVAP large leak

monitor · typical $0–$450

A big vapor leak. Loose cap, unclipped hose after a filter job, or a split canister. The car is safe to drive; the light is a leak flag, not a breakdown.

Usual first look · Cap, hose, filler neck, canister

Ask them to start at the cap and filler neck before quoting the canister.

Say this
I have P0455 stored. Ask them to start at the cap and filler neck before quoting the canister.

Safe to look at in the driveway (cap, boot, connector)

SAE layout: powertrain (engine / transmission). Subsystem looks like auxiliary emissions (EVAP, EGR, catalyst). Generic (SAE) code.

This is an SAE-generic layout. The number is real even if our dictionary has no paragraph yet.

Take P0455 to quote defense

Paste the RO. Circle the line they hung on this pointer. The code is not a parts list.