Know your car

Signs of a Failing EVAP canister

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The canister purge valve, also commonly referred to as the purge valve, is an important component of your Evaporative Emission Control (EVAP) system. This system restricts the fuel vapours created in your fuel tank from escaping into the atmosphere by trapping them in a charcoal canister. When your engine begins to run at regular speed, the EVAP system slowly allows these vapours to be released into your engine, which burn like regular fuel. The flow of these vapours is controlled by your canister purge valve, which regulates when and how much of these vapours enter your engine. The canister purge valve is electrically operated, and is also referred to commonly as a solenoid. The most common purge valve issues are when the purge valve is stuck open or closed, or does not open at the proper time. The symptoms are listed below that may indicate your canister purge valve is not functioning properly. 1. Check Engine Light Is On The first sign of trouble for your canister purge valve is the

How do I get the check engine light to go off?

How to Reset a Check Engine Light

Check engine lights go on when there is a problem in the engine or the emissions control system. You should always have the codes generated by your car's computer scanned and read so you can determine the cause. You can reset the light once you have fixed the problem. This article will tell you how to reset the check engine light in your vehicle.

Method One of Two:
Use a Code Scanner

  1. 1
    Connect the scanner to the on-board diagnostic connector (OBD-II) under your steering column. Turn your ignition switch to "On." Turn off all accessories.

  2. 2
    Press the "Read" button on your scan tool to view the engine's error codes.Write down the code or codes in the order they were received for future reference and repairs if necessary.
  3. 3
    Press the "Erase" button on your scanner to clear the error code.Clearing any codes present will turn off your check engine light. Some scanners have other capabilities like freeze frame that records some sensor readings when a code was set and erasing the codes will also erase this file.
    • Some scanners might have an automatic option and a "Yes" or "Clear" button instead of the "Erase" button.

Method Two of Two:
Erasing the Code (Old Way)

  1. 1
    Disconnect your car's battery by removing the positive and negative cables. Use a wrench to remove the cables if necessary.
  2. 2
    Press and hold your horn for 30 seconds to drain any remaining electricity from the capacitor.
  3. 3
    Wait 15 minutes and reconnect your battery. The codes should be erased which will cause your engine light to turn off. This process may not work on all vehicle's computers. If the battery is disconnected and the light comes right back on, this may indicate an active problem and should be addressed and fixed.

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