- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
P0446, This is a EVAP code,check the gas cap is the seal torn?Do you tighten the gas cap properly,If there is a circuit problem this will reside in the CCV (canister closed valve),VSV (pressure switching valve),or a disconnected hose at the charcoal canister,if anything just replace the gas cap first,clear the code and go from there
P0446 Evaporative Emission Control System Vent Control Malfunction Vacuum hose cracks, holed blocked, damaged or disconnected (1), (4), (5), (6) and (7) Open or short in vapor pressure sensor circuit Vapor pressure sensor Open or short in VSV circuit for vapor pressure sensor VSV for pressure switching valve for vapor pressure sensor Charcoal canister cracked, hole or damaged Fuel tank over fill check valve cracked damaged ECM
The vapor pressure sensor, VSV for canister closed valve (CCV), VSV for pressure switching valve are used
to detect abnormalities in the evaporative emission control system.
The ECM decides whether there is an abnormality in the evaporative emission control system by the vapor
pressure sensor signal.
DTCs P0441 and P0446 are recorded by the ECM when evaporative emissions leak from the components
when there is a malfunction anywhere in the VSV for EVAP, the VSV
for pressure switching valve, or in the vapor pressure sensor itself.
checked basic , gas cap.
More than likely you need to take to a garage , rec. dealership
will have to perform a smoke check to see if there is a leak somewhere or wether there is a malfunction with a vac. solinoid valve(vsv)
You can get this code if you don't tighten the gas cap all the way, or the gas cap is bad. I will put all the detail for the code below and what I would do to fix the problem...
NOTE: Do not top off your tank either. This could cause the 'overfill check valve' to fail, and could cause this code.
Definition of P0441: Evaporative Emission Control System Incorrect Purge Flow
Detection logic: DTCs P0441 and P0446 are recorded by the ECM when evaporative emissions leak from the emissions components or when there is a malfunction in either the VSV for EVAP, the VSV for pressure switching valve, or in the vapor pressure sensor itself. detection cause: Pressure in charcoal canister and fuel tank does not drop or drop in pressure increased beyond the specified limit during purge control (2 trip detection logic)
What I would do: 1. Replace fuel cap and reset computer. If code returns, then proceed to next
The next steps require a diagram, so the purchase of service manual to locate the components is very helpful
2. Check for vacuum leaks in ALL emission hoses 3. Check VSV valve operation (there are three; they are ~$75 new from dealer, and sometimes fail) 4. Check for cracks or leaks around or in the charcoal canister (usually requires a smoke machine) 5. check for voltage to VSV's 6. Last resort: take it to the dealer and have them run a diagnosis. This should run between $50-$100.
The P-0440, P-0441 and P-0446 indicates that you have a leak in the "fume" side of the system. Normally, seeing a 440-441-446 is a loose or defective fuel cap. One would NOT change the evap VSV for a 440-441-446 set of codes. At this point, I agree with you regarding the trust issue. Regarding the caisiter, I cannot speculate yes or no, without further info/codes/etc from your dealer, but, I have replaced several over the past few years; this "could" be true....
the car has been back to the dealer 4 times for the same problem. First time they claimed that they replaced malfunction tank by-pass vsv and codes mentioned are P0440, P0441 and P0446 that were malfunction. the second time they connected the car to their computer and re-scan the vehicle and told us that everything is working fine and the engine light is off, but after one day the light came back and the car went back to the dealer for the third time and now they claim that the problem is from charcoal canister and has to be changed. also after the second visit as soon as i got in my car i could small gas and it hasn't gone away and the dealer says they did nothing wrong and all the problem is from the canister. we really don't know if we can trust what they say.
All are located on Left side of Engine compartment.
the EGR VSV on left side of the angine.
Are a Small selenoid with 2 small hoses and one connector of 2 wires.
Ok.. But I recomend get the Vehicle SCANNED for get the right codes.
You can go to some autoparts, Advance, Autozone, Napa, Pepboy's,
They scan your vehicle with no charge , is just a complementary service.
With the Codes you will FIX or REPLACE the right part.
OK... I hope this hlep on your problem.
If you need more information I will able to help.
Thank you for use fixa..