Is po496 code for gas caps only ?
SOURCE: engine light on Codes show
Hello! Those three codes commonly indicate the followi possibilities:
The gas cap was not sufficiently tightenend ater fueling, a bad gas-cap rubber o-ring, the vehicle had the key in the 'on', or engine running, or the tank was filed all of the way up the neck.
Any one of the abope causes will set all three codes.
SOURCE: P0441 EVAP Emission Control System Purge Flow Fault 2001 Accent
Did u leave the gas cap loose at any point? this is a leak in the evaporative emission system, a loose or defective gas cap is the most common cause of this code.
SOURCE: I did a diagnostic test
the 96-99 had a recall fault with this one,maybe yours fits in the same catagory.Check with Hyundai dealership,irrespective of vehicle age.Also check that there is no fuel odor outside the vehicle,and that the fuel cap is sealing correctly.(when removing this after a warm day there should be a whoosh or shhh sound as it releases).
There is an official release report on this but for some reason I couldnt get it to post on here for you.I will try again soon to do that.
I hope this helps you.Get back with your findings and we can go further if needed.
SOURCE: P0441 EVAP Control System Incorrect Purge Flow
Test the purge valve and the vent valve for leaks. This can only be done with a Tech 2 and or a vacuum pump.
SOURCE: my check light comes on.....the problem PO496 EVAP
p0496 refers to vapor canister problem. it may even be a loose or bad fuel cap. if it is the cap. the light will go out after a few miles driven. if the cap is on tight. loosen it then see if light goes out.
This DTC checks for undesired intake vacuum flow to the EVAP system. The control module seals the EVAP system by commanding the EVAP canister purge solenoid valve OFF and the EVAP canister vent solenoid valve ON. The control module monitors the fuel tank pressure (FTP) sensor to determine if a vacuum is being drawn on the EVAP system
If vacuum in the EVAP system is more than a predetermined value within a predetermined time, this code is set and the MIL (malfunction indicator lamp) is illuminated.
Symptoms of a P0496 DTC will include MIL illumination, and most likely no other noticeable symptoms. Some may experience a hard start / crank condition. In some cases the engine may run rich which may not detected, but can cause damage long-term (think: catalytic converter damage).
Potential causes of a P0496 EVAP code include:
The most common fix for this DTC is to replace the purge solenoid valve. However, be sure to do a proper diagnosis before replacing parts!
Ideally you would use an advanced scan tool, with the ignition on and engine off, you seal the EVAP system using the Seal/Purge function. Then, watch the fuel tank pressure sensor reading when you turn the purge off. If the pressure value is higher than the normal range set by the manufacturer, replace the EVAP canister purge solenoid valve. Refer to a model-specific repair guide for the proper specification.
If you don't have access to the scan tool, you could always disconnect the vacuum line at the purge valve going back to the charcoal canister. Unplug the electrical connector on the purge valve, start the engine, then put your finger on the valve where you disconnected the line. If you can feel vacuum there, the purge solenoid valve is faulty and needs to be replaced. Alternately, you could simply remove the purge solenoid valve and blow into it. It is normally closed, so if air goes through then you need to replace it.
If the purge valve checks out good, either the problem with the valve is intermittent or there is a problem with the fuel tank pressure sensor. To test the fuel tank pressure sensor you will need to have a high end scan tool to monitor the tank pressure with the gas cap removed. If the sensor shows vacuum with the gas cap removed, there is a problem with the fuel tank pressure sensor.
Here is a picture of one purge solenoid valve. Yours may look similar or different, consult a factory service guide or your local vehicle dealership for more details.
Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.
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