2003 LX470 164k miles. P0442 code causing VSC OFF. My mechanic is former Toyota and has tried 3x to track down the issue unsuccessfully. My only concern is driving without the VSC through the winter. Is there anyway to turn the VSC back on if the evap P0442 code is not resolved? Otherwise.... Any suggestions for identifying the cause of the code that you guys have come across. Thank you.
VSC off P0442
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P0442 is usually related to an evap/vacuum leak. Check hoses for cracks. You can also use a smoke machine and avoid the guessing.
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Thanks for the reply. My mechanic replaced all of the suspect hoses, the check engine light and VSC OFF light were dark for a week and then they returned as did the P0442 code. Replaced the gas cap.... I dont know what else to try and dont want to go through the winter without the VSC. Was hoping I could pull a fuse perhaps?? Thanks again
Someone may have figured way to fool ECU, to not see EVAP codes or not shut down ABS system (VSC). But I'd not try.
Likely you will need a new Charcoal Canister (CC). I chased a P0442 DTC in a 03LX 322K mile, found nothing wrong. R&R CC, no more DTC.
Likely you will need a new Charcoal Canister (CC). I chased a P0442 DTC in a 03LX 322K mile, found nothing wrong. R&R CC, no more DTC.
I had the wire break to the rear evap solenoid (the one that connects to the charcoal canister) above the spare tire (also a 2003 here). That caused the vapors not to escape the canister, which caused the canister to saturate with fuel. That open circuit, by itself, did not cause a unique code. I only found it by inspecting the canister after dropping the spare tire.
Do you have any fuel smell from the back of the truck? That was the tell for me.
Do you have any fuel smell from the back of the truck? That was the tell for me.
Unless I'm understanding wrong, the vsv attached to the canister is more related to checking the system. Anyways if the VSV on the canister fails it can be replaced with 90910-12264. I used a WELLS 2M1257 to replace it. I was getting persistent codes and I traced out vacuum lines, and tested all the VSVs and found my Canister VSV was not working. Once I replaced it with that part the code has not come back.
That's not available replacement part on 2003. Which is year Toyota moved CC to rear in the 100 series.
Keep in mind. We've 3 different CC. 98-02, 0-05 and 06-07.
It's a very good idea to list your vehicle in your signture line.
Yes, the VSV on the canister is not a Toyota replacement/service part. Yes, it can be replaced, but you have to use an aftermarket part; the Wells part is as good as you're going to get. FWIW, of the two engine/engine compartment mounted VSVs, only one is still available, so you might as well save yourself some money and buy all of them from Rock Auto.
I went through the (agonizingly complex) troubleshooting procedure recently for a customer, however his canister had so many failures it needed to be replaced, but I was leaning towards the canister–mounted VSV before I was convinced the entire thing was trash.
I deleted the Jimmy Carter comment after I wrote it, but it always makes me feel better when I give him credit.
I went through the (agonizingly complex) troubleshooting procedure recently for a customer, however his canister had so many failures it needed to be replaced, but I was leaning towards the canister–mounted VSV before I was convinced the entire thing was trash.
I deleted the Jimmy Carter comment after I wrote it, but it always makes me feel better when I give him credit.