A loose, missing, or damaged fuel filler cap; Cracked or disconnected evaporative emission hose at the canister or purge valve; Failed canister purge volume control valve stuck open or closed; Leaking or cracked charcoal canister; Faulty fuel tank pressure sensor giving false readings; Corroded or damaged wiring to the canister purge valve or pressure sensor; Small leak from a rusted fuel tank seam or filler neck

DTC codes / Nissan codes / P1457

P1457 · NissanEvaporative Emission Control System Leak Detected Control Canister System

P1457 on Nissan vehicles means the engine computer has detected a leak in the evaporative emission control system, specifically the control canister circuit that captures and stores fuel vapor. The computer runs a pressure or vacuum test on the sealed system and flags this code when the system cannot hold the expected pressure, indicating a vapor leak.

SystemPowertrain

Code typeNissan specific

SeverityLow

Fix difficultyIntermediate

AreaAuxiliary emission controls

Symptoms you may notice

Illuminated check engine light, often with no other noticeable symptoms
A faint raw fuel odor around the rear or engine bay after parking
Difficulty refueling or a fuel nozzle that clicks off repeatedly
Slightly rough idle or hesitation in rare cases when the purge system is stuck open
No driveability change in most instances, as the fault is emissions-related

Common causes, most likely first

A loose, missing, or damaged fuel filler cap
Cracked or disconnected evaporative emission hose at the canister or purge valve
Failed canister purge volume control valve stuck open or closed
Leaking or cracked charcoal canister
Faulty fuel tank pressure sensor giving false readings
Corroded or damaged wiring to the canister purge valve or pressure sensor
Small leak from a rusted fuel tank seam or filler neck

How to diagnose and fix it

Inspect and tighten or replace the fuel filler cap, then clear the code and retest
Visually check all evaporative emission hoses and connections at the canister and purge valve for cracks or looseness
Use a scan tool to command the purge valve and canister vent valve while monitoring fuel tank pressure to isolate the leak
Perform a smoke test on the evaporative system to pinpoint the exact leak location
Test the canister purge volume control valve for correct resistance and operation, replacing if faulty
Check the fuel tank pressure sensor signal for accuracy against a known good sensor or vacuum reading
Repair any damaged wiring or connectors at the purge valve and pressure sensor, then clear codes and verify the monitor completes

Leak detection traps on Nissan evaporative systems

A fuel filler cap that looks fine can still leak under test, so always pressure-test the cap or substitute a known good one before chasing hoses.
The canister purge volume control valve on many Nissan models is prone to sticking due to carbon buildup, which sets P1457 without any visible hose damage.
A smoke test is far more reliable than a visual inspection because many evaporative leaks are pinholes in the top of the tank or along the filler neck where you cannot see them.
This code does not always mean a large leak; a tiny pinhole or a failing pressure sensor can trigger it, so do not replace the canister before testing the sensor and wiring.
After any repair, the evaporative monitor must run through a complete drive cycle before the code will clear, so a quick erase and short drive may falsely suggest the fault is fixed.

Can I keep driving with P1457?

It is generally safe to keep driving with P1457 because the fault affects emissions rather than engine operation, but avoid topping off the fuel tank past the first click and have the leak repaired soon to prevent fuel vapor odors and potential emissions test failure.

Tools that help

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Guidance is general and written for Nissan vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.