Emissions space regulated through the EVAP emission regulate canister which falls short when the fuel tank gauge walk not work-related or you fail an emissions test.

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Warning: instead of the EVAP emissions manage canister will need you come raise your automobile on a hydraulic elevator or with jacks and also jack stands. It will likewise require you to remove power native the battery. Make certain to remove the optimistic and negative terminals indigenous the battery prior to touching any kind of components or removing any parts.

Part 1 that 3: determining the symptom of a poor EVAP emissions regulate canister

Quite often, a trouble with the EVAP device or emissions regulate system is electric in nature or with sensors the monitor this system. In some cases, a trouble with the EVAP canister will cause an OBD-II error code (P-0499) that shows a pressure difficulty with the EVAP system. There space a couple of warning indications that might also indicate that a difficulty with the EVAP emissions regulate canister exists including the following:

Check Engine Light screens on dash: when there is a trouble with the EVAP emissions manage canister, the check Engine irradiate will display screen on the dash. When a pressure problem is detect or excess vacuum is uncovered in the fuel cell, the ECM detects the issue and triggers the check Engine irradiate to come on. This light demands to it is in reset after instead of the EVAP emissions regulate canister if the is the source of the error code.

Excess push inside the fuel cell: when the EVAP canister i do not care clogged or the charcoal inside the filter it s okay saturated v too lot moisture (which is caused by excess water in the gasoline), the filter stop collecting vapor from in ~ the fuel cell. This causes excess push to develop in the fuel tank top to diminished fuel pressure, too lot fuel push and, in some cases, damaged fuel lines or seals top top the fuel cell. This task triggers the inspect Engine Light and also other fuel system warning indicators.

Fuel tank gauge doesn"t work: periodically when there is excess push inside the fuel cell, the fuel tank gauge displays inaccurate information. This may suggest that over there is a trouble with the EVAP canister, which have to be inspected by an ASE certified mechanic.

A failure emissions test: The EVAP canister is a an important component of emissions testing. If the canister is not working efficiently, the can cause a auto to fail one emissions test.

Part 2 of 3: instead of the EVAP emissions regulate canister


As we indicated above, over there are frequently two different locations because that the EVAP emissions manage canister, close to the fuel cell and inside the engine compartment. Because the specific location of this component is unique to the auto you"re working on, it is highly recommended to acquisition a organization manual because that the specific make, model and also year of auto you"re servicing. The organization manual commonly gives friend the precise location that the EVAP canister along with particular replacement measures as encourage by the engineers that developed these vehicles.

Materials Needed

Boxed end wrench or ratchet wrenchFlashlightFlathead screwdriver Jack Jack stand or hydraulic liftReplacement EVAP emissions regulate canisterReplacement vent hoses

Tip: Make sure to wear security glasses throughout all phases the this project as the potential because that debris falling right into your eyes is high when working underneath a vehicle.

Warning: If you testimonial the information over or the procedures below and also have identified that this project is too complex or past your comfort level, please perform not effort to change the EVAP vent solenoid. Among our neighborhood ASE certified mechanics will certainly be happy to help you.

Step 1: Disconnect the vehicle"s battery. Situate the vehicle"s battery and also disconnect the confident and negative battery cables before proceeding.

The EVAP canister is attached come an electric harness.

Step 2: raise the rear of the vehicle. The EVAP emissions manage canister is located on the driver side, close to the behind tires.

Jack up the automobile from the recommended jack placement and also place the rear of the auto on jack represents support. Make sure to keep push on the jack ~ lowering the auto onto the jack means extra safety.


Step 3: find the EVAP canister. On many domestic and also foreign vehicles marketed in the US, the EVAP emissions canister is situated next come the fuel cell.

It is shame in a rectangular or spherical design and also has 3 vapor currently attached to it. One heat attaches to the fuel cell, one to the EVAP purge solenoid and also one to the EVAP vent solenoid. Over there is also an electric harness attached to this canister.

Step 4: Lubricate the bolts and also slots v penetrating fluid. To avoid stripping bolts, spray penetrating liquid onto the bolts and the clips that organize the EVAP canister top top the vehicle.

Since this part has to be exposed to road grime, water and, in part cases, salt; it"s probable the the bolts have rusted. Spraying them with penetrating oil will mitigate the potential of stripping these bolts and also save you a most time and also frustration.


Step 5: remove the electrical harness. When you"ve injected the bolts with penetrating oil, let that soak in for a while.

In the meantime, you"ll notification that the EVAP canister has actually an electric harness attached to the unit. Remove this harness by inserting a small, level blade screwdriver right into a slot that contains a little plastic clip. Lower the clip v the screwdriver and also carefully remove the electrical harness indigenous the EVAP canister.

Tip: On some canisters there will certainly not be an electrical harness. However, there must be a sensor or other electric wire attached for monitoring the unit. Eliminate as instructed in your car service manual.

Step 6: eliminate vent hoses indigenous the EVAP canister. As defined above, there are frequently three hoses attached come the canister: the EVAP vent solenoid, the fuel cell, and also the EVAP purge solenoid.

Remove all 3 of these hoses and clearly mark which hose attaches to the particular male installation on the EVAP emissions regulate canister. Execute this by making use of masking tape and also marking explanation on the tape, then wrapping tape on each hose.


Step 7: eliminate the bolt(s) holding the EVAP emissions control canister. The EVAP emissions regulate canister is attached come a bracket in 2 ways.

First, there room two bolts that secure the canister to a bracket. On part vehicles, a secondary set of clips secures the canister come the vehicle"s undercarriage. Over there are generally one or 2 bolts. Remove these bolts utilizing a ratchet, extension and a 10mm socket (in most cases it will certainly be a 10mm).

Step 8: eliminate EVAP canister indigenous the clips (if applicable). In many cases this component is attached to a series of clips ~ above the backside.

You have the right to gain access to this clips ~ you remove the bolts. Utilizing a flat blade screwdriver, very closely depress ~ above the clip and slide the EVAP emissions canister turn off the bracket.

Step 9: eliminate the old EVAP emissions control canister. As soon as all wires, hoses, and clips have actually been removed, the canister should quickly come off.

Remove the old canister and also inspect that for any corrosion, holes or burn marks that may have added to failure.

Step 10: install the new EVAP emissions regulate canister. The surroundings of this ingredient is an exact reversal come the removal.

Prior to installing the new canister, inspect the condition of the vent hoses. If they are worn, cracked or space showing indicators of age, replace them.

Step 11: connect bolts and also clips. On slide the EVAP canister onto support clips (if applicable) and attach the EVAP canister come the bracket through the bolts.

Step 12: Reattach vent hose and also electrical harness. Anything the was removed should be reinstalled together before.

Step 13: Clean up under vehicle. Before you end up the job, make sure to eliminate all tools, debris, and also hardware indigenous under the car to stop running over them v your vehicle.

Step 14: Lower automobile from jack stands.


Step 15: Reconnect battery cables. Tighten the cable with a wrench.

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Part 3 the 3: test driving the vehicle

A test journey for this fix is actually really short, as result of the truth that in many cases, the failure of this part will display up at idle or begin up. However, prior to you finish the check drive, it"s necessary to begin the vehicle and clear any type of error codes that previously were downloaded. This will give you a "clean slate" in i beg your pardon to check the brand-new EVAP emissions manage canister.

Step 1: begin the vehicle. Let it heat up to operation temperature.

Step 2: examine the dashboard come verify the the check Engine irradiate does no come on. If that does, you should shut the vehicle off and also complete a diagnostic scan.

The error codes have to be cleared on many vehicles after completing this service.

Step 3: Shut turn off the vehicle. After verifying that the examine engine or various other lights are gone, shut the automobile off.

If error codes continue to display, recheck your relations to the canister together it"s feasible that the vent currently are mounted incorrectly.

Step 4: take it the auto on a 10 mile roadway test. Return home and also verify the the inspect Engine light does no illuminate.

This task is fairly simple come complete; however, because you"re working v the EVAP system and also fuel system, there might be a few complicated steps. If you"ve review these instructions and also still don"t feel 100% confident in completing this repair, please contact one that altoalsimce.org’s regional ASE certified mechanics to finish the evaporative emissions regulate canister replacement because that you.