This is generally caused by a leak in the hose somewhere. This hose is long in length plastic and has several places it could be leaking from. You'll have to take it to a shop that is equipped with a leak tester that uses smoke. They will fill the hose with smoke and easily find the leak. There really is no easy way to find it other than that. Hope that helps you.
SOURCE: What is EVAPORATIVE EMISSION...Purge Flow?? Mitsubishi Mirage?
This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. Try changing the gas cap first then check the rubber hoses that are visble on top of the engine. Vote "Yes" for me!
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: 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.
I sent to an auto parts place and bought it and casually asked the clerk where it went. He almost offered to go out into the parking lot to help me. He told me where it went, but then I forgot. They ran out of manuals (handy and cheap), but I got one on order. PS: Kia used the same one and it costs either the same or less. Back then there really wasn't much difference between Kias and Hyundais. You could call up one of the nationally known auto parts suppliers and simply ask the guy over the phone and tell him you'll come down and pick it up if he has one.
the large leak could be a loose tank cap
code p 0441 refers to evaporative emission (EVAP) system--incorrect flow detected === causes ---hose /connection/s,-- intake leak--EVAP canister purge valve
probably need to replace the valve but test first for the large leak or cap loose fault as it may fix both
P0440 Evaporative emission (EVAP) system - malfunction
Possible causes: Hose connection(s), intake leak, EVAP canister purge valve
P0441 Evaporative emission (EVAP) system - incorrect flow detected
Possible causes: Hose connection(s), intake leak, EVAP canister purge valve
P0442 Evaporative emission (EVAP) system - small leak detected
Possible causes: Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve
P0443 Evaporative emission (EVAP) canister purge valve - circuit malfunction
Possible causes: Wiring, EVAP canister purge valve, ECM
P0444 Evaporative emission (EVAP) canister purge valve -open circuit
Possible causes: Wiring open circuit, EVAP canister purge valve, ECM
P0445 Evaporative emission (EVAP) canister purge valve -short circuit
Possible causes: Wiring short circuit, EVAP canister purge valve, ECM
P0450 Evaporative emission (EVAP) pressure sensor - circuit malfunction
Possible causes: Wiring, EVAP pressure sensor, ECM
P0455 Evaporative emission (EVAP) system - large leak detected
Possible causes: Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve
P0456 Evaporative emission system - very small leak detected
Possible causes: Mechanical fault, hose connection(s), EVAP pressure "sensor
P0457 Evaporative emission system - leak detected (fuel cap loose/off)
Possible causes: Mechanical fault, hose connection(s), EVAP pressure sensor
P0458 Evaporative emission system, purge control valve -circuit low
Possible causes: Wiring short to earth, EVAP valve
P0459 Evaporative emission system, purge control valve -circuit high
Possible causes: Wiring short to positive, EVAP valve
Evaporative Emission Purge Solenoid
Description & Operation
The duty cycle EVAP canister purge solenoid (DCP) regulates the rate of vapor flow from the EVAP canister to the intake manifold. The Powertrain Control Module (PCM) operates the solenoid.
During the cold start warm-up period and the hot start time delay, the PCM does not energize the solenoid. When de-energized, no vapors are purged. The PCM de-energizes the solenoid during open loop operation.
The engine enters closed loop operation after it reaches a specified temperature and the time delay ends. During closed loop operation, the PCM cycles (energizes and de-energizes) the solenoid 5 or 10 times per second, depending upon operating conditions. The PCM varies the vapor flow rate by changing solenoid pulse width. Pulse width is the amount of time that the solenoid is energized. The PCM adjusts solenoid pulse width based on engine operating condition.
Removal & Installation
The duty cycle evaporative (EVAP) canister purge solenoid is located in the engine compartment near the brake master cylinder.
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