Causes and Fixes P0496 Chevy Traverse

By | December 13, 2022

Causes and Fixes P0496 Chevy Traverse
If you have a Chevy Traverse and it gives a P0496 OBDII error code, there is a problem with the Evap system.

An OBDII scan tool will give a P0496 Evaporative Emission System High Purge Flow.

There are several causes of an Evap system error which are listed below.

What is a Chevy Traverse P0496 OBDII Error Code?

A P0496 code is an “Evaporative Emission System High Purge Flow system error”.

This means there is an error in the EVAP system, which reduces emissions by stopping vapors from venting into the atmosphere.

The EVAP system keeps the gas vapors enclosed and feeds them back into the engine to be burnt off.

Often a vehicle will not have any symptoms and run well, but the engine light will come on, and the vehicle will not pass an emission test.

Causes and Fixes P0496 Chevy Traverse

  1. Gas Cap
  2. Causes and Fixes P0496 Chevy Traverse Gas Cap
    If the gas cap is not making a good seal, it can cause a P0496 error code.

    The gas cap is a part of the EVAP system, which seals in the gas vapors.

    When it fails and does not seal well, the vapors can escape, which the onboard computer (ECM) will read and give a P0496 code.

    Check the gas cap is on all the way, it is not cracked, and the inside rubber seal is not damaged.

  3. Purge Valve
  4. Causes and Fixes P0496 Chevy Traverse Purge Valve
    The purge valve is a common problem with the Chevy Traverse and a P0496 error code.

    A purge valve stays closed when the engine is not running and opens when the engine is running so the vapors can be burnt away.
    Causes and Fixes P0496 Chevy Traverse Purge Valve Location
    When it fails, it will stay closed or open all the time, causing a problem in the system.

    Replacing the purge valve is commonly done by DIY mechanics but as always, call a professional if in doubt.

  5. Vapor Canister
  6. The vapor canister is also a part of the Evap system and can also cause a P0496.

    While it fails much less commonly than the purge valve, it can cause a problem if it malfunctions.

    It is a DIY task often replaced by many DIY mechanics and is also a low-cost part.

The Chevy Traverse with a P0496 error code is usually a straightforward fix.

The main components to fail are usually the gas cap, purge valve, or vapor canister.

The fixes are commonly done by DIY individuals, and the parts are low-cost.

Of course, if in doubt, be sure to take your vehicle to a professional mechanic.

Have you had issues with a P0496 OBDII error code? Let us know your thoughts below.

Category: Chevy OBD OBDII Error Codes

About Bob Thomas

Bob Thomas is an automotive mechanic with 30 plus years experience. He is a contributor to several publications and has written many articles on automotive maintenance and repairs. He also has created many auto repair videos on YouTube.

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