QuestionHello, thank you so much for your help. I found out it is a cannister close valve that needs replacing. Any advice would be very helpful. Could I fix this myself? Thank you again.
Anna
-------------------------------------------
The text above is a follow-up to ...
-----Question-----
Hello, I have a 2000 Hyundai Tiberon. Today I did a diagnostic check at Advanced Auto Parts and got 4 codes back. PO446, PO743, PO765, and PO745. Can you tell me what this means, and maybe a guess on how much to get it fixed? I appreciate your time. Thanks.
-----Answer-----
P0446 indicates that your fuel evaporative system is retaining vacuum. There are many possible causes for this, and figuring out which one may require extensive diagnosis. The most common causes are:
1. Canister close valve sticking shut
2. Canister filter clogged
3. Liquid fuel in canister or evap line
4. Faulty fuel tank pressure sensor
5. Stuck open purge control valve.
I've seen all of these with enough frequency that I cannot point to one as being the most likely cause.
P0743, P0745, and P0765 indicate trouble in the circuits for three of your transmission solenoids. It's doubtful all three solenoids are bad, so that leaves the possibilities of poor grounding, wiring problems, or a defective transmission control module (TCM). Most frequently, the problem is with the wiring or solenoids inside the transmission, but the fact that you have codes for three solenoid circuits increases greatly the probability that there will be some cut or chafed wires external to the transmission.
I won't be able to give you an estimated repair cost for two reasons. First, you'll need to do some diagnosis (or pay to have it done) to find out what the specific problems are, and second, repair costs vary greatly by facility and geographic location. Once you know what specifically must be done to repair the vehicle, you can then phone places and check prices. But in this case, since diagnosis may be tricky, you're probably best off choosing a shop with an excellent reputation for honesty and ability to diagnose difficult issues. If the same shop does the diagnosis and repair, you have some leverage over them if the repairs do not fix your problem.
AnswerIf you've got basic tools and are familiar with basic auto repairs, you can probably replace the canister close valve yourself. It's located in the housing with the canister under the left rear of the car.
Remove the one or two 12mm bolts/nuts holding the canister up, unplug the close valve, remove the hose from the valve, and pry the valve out of the canister filter. Apply some lube to the grommet, install the new valve, and reattach the hose and connector. Then reinstall the cansiter.
