2014 Dodge Ram P0457 Loose or Missing Fuel Cap

2014 Dodge Ram


  • 3.6-Liter V6 Pentastar
  • Horsepower: 305 hp
  • Torque: 269 lb-ft


  • 8-speed automatic

Fuel Economy:

  • The EPA estimated fuel economy is around 17-18 MPG city and 20-22 MPG highway.

Understanding and Resolving P0457 Code on Your 2014 Dodge Ram Truck

The check engine light can be a source of anxiety for any vehicle owner. One common trouble code that may illuminate this warning is P0457, which specifically relates to the evaporative emissions system. If you own a 2014 Dodge Ram truck and have encountered this code, don’t fret. In this article, we’ll delve into what P0457 means, its causes, and how you can diagnose and resolve the issue to keep your truck running smoothly.

What is P0457?

P0457 is an OBD-II trouble code that indicates a problem within the evaporative emissions control system of your 2014 Dodge Ram truck. More precisely, it translates to “Evaporative Emission Control System Leak Detected (Fuel Cap Loose/Off).” The vehicle’s computer triggers this code when it detects a potential system leak, often because of an improperly sealed or missing fuel cap.


Common Causes of P0457 on the Dodge Ram

  1. Loose or Missing Fuel Cap: The most frequent culprit behind a P0457 code is a fuel cap that is not securely fastened or is missing altogether. Even a slight gap can lead to a vacuum leak in the system.
  2. Damaged Fuel Cap: A damaged or worn-out fuel cap may not seal properly, allowing fuel vapor to escape and triggering the code.
  3. Faulty Evaporative Emissions System Components: The evaporative emissions system includes various components such as hoses, the charcoal canister, and the purge valve. Any damage, disconnections, or malfunction in these parts can cause a leak.
  4. Corroded Filler Neck: Over time, the filler neck connecting the fuel cap to the fuel tank can become corroded or damaged, resulting in a leak.

How to Diagnose and Resolve P0457 on the Dodge Ram

  1. Check the Fuel Cap: Start by ensuring that the fuel cap is securely tightened. Turn it until you hear multiple clicks, indicating a proper seal. If you find a damaged or missing cap, replace it with a new, genuine Dodge Ram fuel cap.
  2. Inspect the Filler Neck: Examine the filler neck for any visible damage, corrosion, or rust. If you detect issues, consider replacing this component.
  3. Inspect Hoses and Connections: Carefully inspect all hoses and connections within the evaporative emissions system. Look for cracks, loose connections, or signs of wear. Replace or repair any faulty components.
  4. Clear the Code: After addressing potential issues, clear the trouble code using an OBD-II scan tool or by disconnecting the truck’s battery for a few minutes. This will reset the system.
  5. Monitor for Recurrence: Drive the vehicle and check if the P0457 code reappears. If it does, it’s advisable to consult a professional mechanic for a more comprehensive diagnosis and repair.


A P0457 trouble code on your 2014 Dodge Ram truck is often a straightforward issue related to the evaporative emissions system. By carefully inspecting and addressing the common causes, such as a loose fuel cap or damaged components, you can resolve this problem and keep your truck running efficiently. If you’re uncertain about any of the steps involved, it’s advisable to seek the assistance of a professional Dodge mechanic to help resolve the issue. Prompt attention to check engine lights will help ensure your Dodge Ram remains a reliable and environmentally responsible vehicle.

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