What are the common causes of P1457?

A leak in the EVAP system preventing the tank from holding vacuum. A faulty EVAP canister purge valve. An open or short in the EVAP purge valve harness. A fuel filler cap that will not seal.

Read the fuel tank pressure sensor during the EVAP test. Inspect the EVAP hoses and connections for leaks. Check the fuel filler cap seal. Command the purge valve and watch for vacuum in the tank. Replace the leaking or faulty EVAP component. Clear the code and retest.

P1457

Unable To Pull Vacuum In Tank

System: Auxiliary emission controls (P code)
Lamp: Check Engine Light
Category: Powertrain - Auxiliary Emissions Controls

What it means

P1457 means Unable To Pull Vacuum In Tank.

Check these first

A leak in the EVAP system preventing the tank from holding vacuum
A faulty EVAP canister purge valve
An open or short in the EVAP purge valve harness
A fuel filler cap that will not seal

What to do next

Read the fuel tank pressure sensor during the EVAP test
Inspect the EVAP hoses and connections for leaks
Check the fuel filler cap seal
Command the purge valve and watch for vacuum in the tank
Replace the leaking or faulty EVAP component
Clear the code and retest

Look up another code

Code or symptom

Enter a full code or a symptom. Press / to search. How to read a code

Type a code above, or start from a symptom or a common code.

Updated

Generic SAE J2012 definition. Last updated 2026-10-10.