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EVAP (Evaporative Emission Control) system

Hello - a P0455 (https://www.yourmechanic.com/article/p0455-obd-ii-trouble-code-system-gross-leak-evaporative-emission-by-john-nelson) indicates a large evaporative emissions leak. This problem code originates with the evaporative emissions system purge valve, which expects positive pressure flow from the evap emissions cannister - which captures fumes from the fuel tank...

If your problem is only related to not being able to put fuel in your tank, this may actually be related to your evaporative emissions system rather than the fuel tank itself. The EVAP system prevents fuel vapors from the...

Restriction in the EVAP vent or purge hoses can also cause this code. A restricted EVAP canister will also set P0446 (https://www.yourmechanic.com/article/p0446-obd-ii-trouble-code-evaporative-emission-control-system-vent-control-circuit-malfunction-by-spencer-clayton). A smoke test can find restricted canister. I suggest having a mechanic come out and diagnose your Check...

Hello, thank you for writing in. There are several reasons the EVAP canister would develop a leak, but an accident is absolutely capable of causing it. Unfortunately the more compact a car gets, the more difficult some of these components...

It sounds like the evap vent is clogged near the fuel tank. This will cause the excessive pressure build up of pressure and the canister vent can get blocked with debris. Have this system checked and repaired as needed.

Hello, thank you for writing in. To get an official quote, you will want to contact our service department (https://www.yourmechanic.com/services). I can tell you that replacing the oxygen sensor can cost from $100-200. The evap canister can be more expensive,...

The purge valve is mounted on the engine and you will see hose connections from the valve to the intake manifold as well as a wire harness connection. The purge valve should be tested to determine if it is actually...

Hello, thank you for writing in. The first two symptoms may be related. Finding a leak in the EVAP system will take some time and focus. If the noise goes away after fixing the leak, then we know we can...

The “check fuel fill inlet” warning light means that there is a problem with the fuel tank cap seal. The fuel cap could be missing, loose, damaged, screwed on too tightly and thus distorted, there is debris in the fuel...

To remove the canister, perform the following: Remove the two bolts that hold the canister onto the car and drop it down. Then remove the bolts that secure the canister to the shield cover. Disconnect the wiring harness to the...

If the check engine light is only coming on when your on the freeway it might be a problem that the computer is only recognizing at cruising speeds. Your best bet would be to have a certified mechanic read the...

Your car has a small purge valve that controls the venting of fumes from the fuel tank as these fumes build up inside, particularly when you are refueling the car with gas. The EVAP system prevents fuel vapors from the...

Hello. Code P0446 comes up due to a problem with the EVAP emissions vent system. This system collects evaporating fuel so that it does not get released into the atmosphere. The code almost always means that the vent valve has...

The most common cause for this hard or no start after getting fuel is the purge valve is leaking fumes to the engine while fueling the vehicle. You should first have any computer codes checked by scanning the computer and...

In order for the EVAP system to complete the drive test you need to be at a cruise steady speed with engine warm and no check engine light on. The actual speed is needed will be in overdrive above 45...

The car's self diagnostics should be able to tell you if there is a leak in the line, The EVAP monitor will pull a vacuum on the tank and keep track of the fall in pressure. It will light the...

Hi there. Check the brakes and the wheel speed sensors to see if the are damaged or worn causing the ESP light to come on. A worn brake (https://www.yourmechanic.com/services/squealing-noise-from-brakes-inspection) pad can cause the ESP light to come on as the...

First, remove and reinstall the gas cap, clear the code P0455 (https://www.yourmechanic.com/article/p0455-obd-ii-trouble-code-system-gross-leak-evaporative-emission-by-john-nelson), and drive the vehicle for a few days and see if the code comes back. If the code comes back on, then either the gas cap (https://www.yourmechanic.com/services/gas-cap-replacement) needs...

Hello - the P0446 (https://www.yourmechanic.com/article/p0446-obd-ii-trouble-code-evaporative-emission-control-system-vent-control-circuit-malfunction-by-spencer-clayton) code is an indication that the evaporative emissions purge valve electrical circuit has had a loss of electrical power to the vent valve that allows fresh air to enter the evap cannister. This could be...

Hi there. Take an air hose and with using low pressure, blow air into the tank pipe and see if the air comes out of the other pipes with no restrictions. Then with using low pressure, blow air into the...