P0460 Evaporative Emission Control System Leak Detected (gross leak)

Have you ever been driving along and suddenly your check engine light comes on? It can be a nerve-wracking experience, especially if you don’t know what’s causing it.

One common issue that can trigger this warning is a problem with the evaporative emission control system. Specifically, a P0460 code means that the system has detected a gross leak. In this article, we’ll take a closer look at what that means and what you can do about it.

Understanding the Evaporative Emission Control System

Before diving into the specifics of a P0460 code, let’s review what the evaporative emission control system does. Essentially, it’s responsible for preventing fuel vapors from escaping into the atmosphere. When you fill up your gas tank, the fuel can release vapors that contribute to air pollution.

The evaporative emission control system captures those vapors and stores them in a charcoal canister. Later, when the engine is running, those vapors are released and burned off, rather than being released into the air.

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What Causes a P0460 Code?

Now, let’s talk about what can trigger a P0460 code. As we mentioned, it means that the system has detected a gross leak. This could be caused by a number of factors, including:

  • A damaged or faulty gas cap
  • A cracked or damaged charcoal canister
  • A leak in one of the hoses that connect the system components
  • A malfunctioning fuel tank pressure sensor
  • A broken or disconnected vacuum line

Any of these issues can cause fuel vapors to escape from the system, which triggers the P0460 code. It’s important to note that this code specifically refers to a gross leak, which means the leak is large enough that it’s easy to detect. If the leak is smaller, it may trigger a different code.

What Are the Symptoms of a P0460 Code?

In some cases, you may not notice any symptoms at all when a P0460 code is triggered. However, there are a few signs that could indicate there’s an issue with your evaporative emission control system. These include:

  • The check engine light comes on
  • You notice a strong gasoline smell when you’re near your vehicle
  • You hear a hissing sound coming from your fuel tank area
  • Your gas mileage decreases

If you experience any of these symptoms, it’s important to have your vehicle inspected by a qualified mechanic. Ignoring the issue could lead to further damage and more expensive repairs down the line.

What Can You Do About a P0460 Code?

If you’ve received a P0460 code, the first step is to check your gas cap. Make sure it’s securely tightened and that the seal is in good condition. If the cap is damaged or faulty, replace it. If that doesn’t solve the problem, you’ll need to have your vehicle inspected by a mechanic.

They’ll use a diagnostic scanner to read the code and determine the source of the leak.

Depending on the cause of the issue, the repairs could be simple or more complicated. For example, if it’s just a cracked hose, that can be replaced relatively easily. However, if the charcoal canister is damaged, that will need to be replaced, which can be more expensive. The important thing is to have the issue addressed as soon as possible to prevent further damage and ensure your vehicle is running safely.


A P0460 code can be a frustrating issue to deal with, but it’s important to address it promptly. By understanding what can cause the code to trigger and what symptoms to look out for, you can take steps to keep your vehicle running smoothly. Remember to check your gas cap first, and if that doesn’t solve the problem, don’t hesitate to take your vehicle to a mechanic for further inspection.


  1. Is it safe to continue driving with a P0460 code?
    While your vehicle may still be drivable with a P0460 code, it’s important to have it inspected by a mechanic as soon as possible. Ignoring the issue could lead to further damage and more expensive repairs down the line.
  2. Can a P0460 code be caused by a faulty fuel tank pressure sensor?
    Yes, a malfunctioning fuel tank pressure sensor can cause a P0460 code to be triggered. This sensor is responsible for monitoring the pressure inside the fuel tank, so if it’s not working properly, it can cause issues with the evaporative emission control system.
  3. How much does it cost to fix a P0460 code?
    The cost of repairs for a P0460 code can vary depending on the cause of the issue. Simple repairs like replacing a cracked hose can be relatively inexpensive, while more complicated issues like a damaged charcoal canister can be more expensive. It’s best to have your vehicle inspected by a mechanic to get an accurate estimate.
  4. Can a P0460 code cause damage to my vehicle?
    While a P0460 code in and of itself won’t cause damage to your vehicle, ignoring the issue could lead to further damage. For example, if the leak is coming from a hose, leaving it unchecked could cause that hose to break completely, which could cause other issues with your vehicle.
  5. How can I prevent a P0460 code from happening in the future?
    The best way to prevent a P0460 code is to make sure your vehicle is well-maintained. This includes regularly checking your gas cap and having your vehicle inspected by a mechanic if you notice any issues. Taking care of your vehicle can help prevent a wide range of issues, including problems with the evaporative emission control system.