# P0456 — EVAP Very Small Leak Detected

> ClearTheCode diagnostic code reference (not OEM service data).

Source: https://clearthecode.com/codes/P0456

**System:** Powertrain · EVAP

**Severity:** minor

## Description

Very small EVAP leak (typically 0.020"). Gas cap, then smoke test the system.

## Diagnostic snapshot

- **Difficulty:** 6/10 — Intermediate diagnostics
- **Est. repair cost:** $120 – $450

## Diagnostic workflow

1. Confirm P0456 with a live scan — note pending vs stored and freeze frame data.
2. Inspect wiring/connectors and related sensors before replacing modules.
3. Clear codes and road-test; re-scan after two drive cycles if the monitor must set.

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