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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Engine Controls - DTCS P0330 To P0480) >> Diagnosis And Testing >> P0457-Loose Fuel Cap >> Theory Of Operation >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
LOOSE OR MISSING FUEL CAP
FUEL FILL CAP
EVAP PURGE SYSTEM MEDIUM LEAK

Always perform the  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  before proceeding. 

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