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EVAP (Evaporative Emission Control) system

Related articles

Symptoms of a Bad or Failing Evaporative Emission Control Canister
Common signs include the Check Engine Light coming on, raw fuel smell coming from the back of the car, and a collapsed or leaking fuel tank.
What Does the Fuel Cap Warning Light Mean?
The fuel cap light tells you when a leak has been detected in your car, most likely from a loose gas cap.
How to Replace an Evaporative Emission Control Canister
Emissions are regulated by the EVAP emission control canister which fails when the fuel tank gauge does not work or you fail an emissions test.
How to Clean Evaporator Drain Tubes
The air conditioning system on a car has evaporator drain tubes than need cleaning if there is dirty air in the car or it is not blowing consistently.
How to Replace a Canister Purge Solenoid
The canister purge solenoid prevents harmful vapor from releasing into the atmosphere. A faulty solenoid will not allow you to pass an emissions test.

Related questions

Question
Codes say evap leak, can a car accident cause it?
Hey there. Depending on the impact of the hit to your van, this may have caused some damage to the EVAP system. If you have an air leak on the EVAP system, then the MAP sensor will not be able...
Question
Can a cracked evaporative canister affect my air filters?
The cabin air filter should be replaced every time you have an oil change. This keeps the air in the cab clean at all times and keeps the AC and heater working in good condition. The filters are not a...
Question
Bad Purge Valve?
Hey there. All modern cars are equipped with an Evaporative Emission Control (EVAP) system. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors in...
Question
Check engine light on getting code P0462
Replacing the pump will probably take care of this.The fuel pump on your car is one of those integral in-tank units that has several functions including the fuel level sensor and the fuel tank pressure sensor. The fuel level sensor...
Question
Code p2402 evapotative emission system leak detection pump control circuit high.
In many cases a control circuit code will point out a problem with the device in the description which is the leak detection pump assembly in this case. The evaporative emissions system should be checked for any air leaks or...
Question
I have and evap leak. I don't know where.
If your vehicle has an EVAP system leak, the Check Engine Light will normally illuminate, because a Diagnostic Trouble Code has been stored, and the Mechanic can use the Code that was stored to start his or her Diagnosis. The...
Question
Check Engine Light stays on - 2006 Jeep Liberty
Hello there, many faults can lead to the replacement of the purge solenoid on your 2006 Jeep Liberty. Without knowing the code stored in the computer I can only offer general advice. From your description it sounds like your vehicle...
Question
Check engine light is on and engine is misfiring
The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors in the charcoal canister. The charcoal canister is filled with activated carbon pellets that can...
Question
Car loses power, Check Engine Light is on, codes for EVAP system leak
If you have an air leak in the EVAP system then the MAP sensor will not be able to determine the air density, and the MAF sensor will not be able to determine the volume of air entering the engine...
Question
Canister purge valve issue. What will happen if I don't fix it right away?
Hey there. The main issue with not repairing the EVAP system is that of passing an emissions test as required in most states. Anytime this system is not working properly, your car will not pass an emissions test. The...
Question
Emissions light on my Volkswagen
This suggests that you may have a vacuum leak or potentially a problem with your evaporative emissions system. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores...
Question
How do I fix the issues related to code P0445 (Failed Emissions Test)?
Diagnostic Trouble Code P0455 has causes in addition to a faulty or loose gas cap. In your circumstance, the first thing you should do is reset the Check Engine Light which will erase the existing codes. Then see if the...
Question
I have trouble starting the vehicle every time I put gas in the car
As you may know, this issue is commonly related to the evaporative emissions (EVAP) system which is comprised of a few components, one of which you have already addressed, the purge valve. In some cases, when you have an air...
Question
Will the Check Engine Light turn off by itself or do I need to manually turn it off after I fix the problem?
Hey there, thanks for writing in. The computer for this year will not turn off the light on its own until the Check Engine Light is turned off using a scanner. The Check Engine Light should be scanned to document...
Question
My car has a fuel smell inside after putting gas in it
This is likely an evaporation emissions system leak. All modern cars are equipped with an Evaporative Emission Control (EVAP) system. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and...
Question
Code P0496.
This may be obvious, but have you cleared the code with the scanner? If so, disregard that first sentence. Codes will not clear immediately after the repair. With an emissions system code, there is also a drive cycle to be...
Question
My car's fuel efficiency is poor and it starts rough
There is a valve that is by the fuel neck next to the fuel filler inlet that measures the fumes from the gas cap and related areas. This valve is known as the EVAP purge solenoid valve. This valve controls...
Question
I got a code for my EVAP (P1457)
First, it is not the PCV. (positive crankcase ventilation) The PCV is there to relieve pressure and gases from the crankcase. The evaporative system keeps the fuel in the fuel tank from evaporating into the atmosphere. They are two separate...
Question
2002 chrysler t & c alternator good but does not charge battery also behind dash buzzing sound
Code P0455 relates to your EVAP system that controls the evaporation of fuel fumes in your fuel tank. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores...
Question
Why am I having trouble getting fuel to go into my tank?
This is likely related to your EVAP emissions system and something called a purge solenoid. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors...

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