P0457

Low Severity

EVAP System Leak Detected (Fuel Cap Loose/Off)

EVAP System

What Does P0457 Mean?

Specifically triggered by a loose or missing fuel cap. Some vehicles have a dedicated sensor for this.

Common Fix

Tighten or replace gas cap

Estimated Cost (DIY)

$5 - $15

Symptoms

  • ⚠️Check engine light
  • ⚠️Gas cap warning message on some vehicles

Related Symptoms

Check engine light on

Common Causes

Loose gas caplikely
Damaged gas cap seallikely
Missing gas cappossible

How to Diagnose P0457

  1. 1Remove and reinstall gas cap until it clicks
  2. 2Inspect cap seal for cracks
  3. 3Replace cap if seal is damaged

OEM Diagnostic Flowchart

Scroll to load technician if/then branches.

Read live data and freeze frame for P0457 to pinpoint the cause before buying parts.

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Related Resources

Repair guides, symptom pages, and wiring diagrams related to P0457.

OEM Manual Evidence

Browse →
2013 Dodge Avenger L4-2.4L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 Dodge Avenger L4-2.4L Service Manual | Operation CHARM Operation CHARM : Car repair manuals f...

2013 Dodge Avenger V6-3.6L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 Dodge Avenger V6-3.6L Service Manual | Operation CHARM Operation CHARM : Car repair manuals f...

2013 Chrysler 200 V6-3.6L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 Chrysler 200 V6-3.6L Service Manual | Operation CHARM Operation CHARM : Car repair manuals fo...

2013 Chrysler 200 L4-2.4L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 Chrysler 200 L4-2.4L Service Manual | Operation CHARM Operation CHARM : Car repair manuals fo...

Related Symptoms

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Check engine light onSymptom Hub

A check-engine light is a graph entry point into code pages, symptom-specific diagnosis, and the exact repair categories most often associated with those failures.

Exact Vehicle Hubs

Browse →
2013 Chrysler 200 L4 2.4l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0457.

2013 Chrysler 200 V6 3.6l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0457.

2013 Dodge Avenger L4 2.4l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0457.

2013 Dodge Avenger V6 3.6l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0457.

Related Codes

P0455: EVAP System Large Leak DetectedRelated

A significant leak in the EVAP system. Often a loose gas cap or a disconnected hose.

P0440: EVAP System MalfunctionRelated

General EVAP system fault — the system that captures fuel vapors is not working properly.

P0442: EVAP System Small Leak DetectedRelated

A small leak in the EVAP system, often a deteriorated gas cap seal or a tiny crack in a hose.

Frequently Asked Questions

Will a gas cap fix P0457?
Almost always yes — P0457 is specifically the gas cap code on many vehicles.
How much is a replacement gas cap?
OEM gas caps are $10-$25. Aftermarket caps are $5-$15 but make sure they have the right seal for your vehicle.

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