P1421 EVAP Canister Gross Leak
What does P1421 mean on a Toyota?
P1421 — EVAP Canister Gross Leak. This Toyota-enhanced code applies to Camry, Corolla, RAV4, Tacoma.
Common causes of P1421
- Fuel cap left loose or off
- Disconnected canister hose
- Cracked canister from impact
- Split filler hose
- Stuck-open vent valve
How to fix P1421
- Tighten the fuel cap and clear the code
- Inspect all canister hoses for disconnection
- Check the canister for impact cracks
- Test the vent valve seal
- Smoke test if the leak persists