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Sienna emmission engine check light

18 messages,  Last post on Jan 06, 2010 at 10:51 AM

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What is this discussion about? Toyota Sienna, Van

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#1 of 18 Sienna emmission engine check light by gunga64

Oct 22, 2007 (11:47 am)

Sienna with 98,000 miles. We had an engine check light that would not go away after resetting the module. Changed the gas cap still went off. Finally had them replace a few hoses and it looks like its all better now.
 
So if you get some emmission codes it could all just be a hose going to the charcoal canister. Costs me 100 ($51 for the engine check and $49 for a hose that costs a buck). But you can fix it yourself if you have hose to replace it.

#2 of 18 Re: Sienna emmission engine check light [gunga64] by ateixeira

Oct 23, 2007 (12:04 pm)

Replying to: gunga64 (Oct 22, 2007 11:47 am)
Thanks for the tip, I'll keep that in mind.
 
I bought a scanner a while ago, back then it was $105 but I've seen them for half that much lately. They're useful to have around.
 
I've used it maybe 3 times for our fleet, and at least 2 other times for friends, so it already paid for itself.

#3 of 18 Re: Sienna emmission engine check light [ateixeira] by gunga64

Oct 25, 2007 (10:23 am)

Replying to: ateixeira (Oct 23, 2007 12:04 pm)
Well neither a new gas cap or the hoses fixed the problem after all. I guess toyota can't seem to determine what it is. All they seem to want to do is replace parts. There is a TSB on my engine light issues. Says replace the VNC valve. Wonder why they don't read their own TSB's.

#4 of 18 Re: Sienna emmission engine check light [gunga64] by gunga64

Oct 28, 2007 (3:51 pm)

Replying to: gunga64 (Oct 25, 2007 10:23 am)
engine code was PO440 and PO446
 
Well the tech at toyota says its the vacuum sensor valve. So purchased one at toyota for $67.00 and I installed it. It was pretty easy just had to remove the air filter top and the component is located on the back. It has a wire connector that comes off pretty easy. It also has two vacuum lines one has a hose one does not.
 
You can remove one hose pretty easy, then the wire connector then remove the 2 philips screws. then you can pull the unit off which also disconnects the other port. Reverse to reinstall. Easy toyota wanted $50+ to install it.
 
For the engine codes I had there was a TSB to replace the VSV I told the tech prior to the work. I guess they ran a test and got the correct error this time. Instead of just wanting to replace the charcoal canister like they wanted to do. That canister costs $270.00 part alone.
 
The only thing that pissed me off is my sienna repair book said the 2001 had the VSV on the fender instead of right on the air filer box like < 2001 Siennas. If I'd known the VSV was right on the box I would have tested it and replaced it on the first round and saved $100.00 bucks. Hate when repair books are not specific. That and the picture of the unit was not exactly right. So hopefully the engine code is gone for good now.

#5 of 18 toyota PO1350 VVT Bank#2 by nmerrill Dec 04, 2007 by nmerrill

Dec 05, 2007 (10:39 am)

My toyota sienna xle has 110000 miles on it. I had to replace the engine at 82000 because of my fault. Since then the check engine light comes on periodically but has gone out. Car has run fine until recently. The check engine light is always on, my mileage is decreasing and I notice the engine reving when at a stop (this would explain the decrease in mileage). When I had taken it to Toyota year ago they could not figure it out after 3 hours. But they reset it and it did not come back on for almost a year. My mechanic is at a loss trying to figure out what to do next with this code. I am not anxious to take it back to Toyota after last time but if I had a clue what it might be then I would feel better prepared.
Anyone have an idea about this code, decreasing gas mileage and engine revving?
Thanks

#6 of 18 Code P1346 Toyota Sienna `01 by veepee1

Dec 11, 2007 (9:26 pm)

I recently changed my timing belt at 106K, after completion I drove for a while then the check engine light illuminated. The vehicle drives beautifully with no apparent malfunction. I had a diagnostic check done and the code P01346 was displayed. I consulted the dealer for some assistance and was told that the rear cam shaft gear was off timing by a tooth which occasionally happens due to the position that cam is situated to see the marks for proper alignment. I however reset the timing again. After driving for a while the C/E light re appeared. Diagnostic test displayed code P1346 indicating VVT sensor/camshaft position sensor circuit, performance Bank 1.
My question is, could the rear cam sensor get defective under the above circumstances. as it is not located in the area of the timing belt that it could be damaged or disturbed during repairs. Your suggestion would be appreciated.

#7 of 18 sienna check engine by nmerrill

Dec 12, 2007 (8:58 am)

Thanks for the info. The only place I have been able to find the code with my engine - P01350 for for Lexus but at least it did indicate bank #2. anybody seen Lexus codes with toyota engines. I know Lexus and toyota are actually under same business structure. nm

#8 of 18 Code PO420 by mpokeo

Nov 15, 2008 (8:50 pm)

I have a 2002 sienna with 140000 miles on it the check engine light is on and i have a po420 catylist code bank 1. I changed bank 1 sensor bank 2 sensor and sensor at cat all coming from toyota. Then i changed the cat the engine pipe and the front cat connected to the manifold which in turn replaced all the cats. I reset the computer and after the drive cycle the same po420 catalyst code bank 1 returned i'm stumped now.

#9 of 18 Re: Code P1346 Toyota Sienna `01 [veepee1] by mpokeo

Nov 15, 2008 (9:11 pm)

Replying to: veepee1 (Dec 11, 2007 9:26 pm)
I had the same code and is definately not alligned right when you re- allign it right the code will go away. Sorry to say but it is still out one tooth. Because of the rear pulley position and when you release the tension back on the belt it is difficult to keep everyhting in place.

#10 of 18 My problem never got fixed by gunga64

Nov 17, 2008 (7:22 am)

Traded in the sienna a year ago. The light never did go out. Took it to a really good
repair place that checked it for emission leaks with smoke. They of course found leaks all over the place. The gas cap area (already replaced the cap once) and the canister leaked as well. They were talking 1500.00 to do the repairs and still would not guarrentee the engine light would go off. So we dumped the van.
 
Sickens me that these sensors cause so many problems and the repair people are clueless to the answer.
 
The repair place did say we had the wrong gas cap. But we got it from toyota, in fact the parts place needed our vin number because toyota had about 3 different caps for that year model. I guess the idiot gave us the wrong cap. Would not be supprised if that was the problem.
 
But the van would stall and got bad gas mileage so it was getting to be too much of a problem. I can live with the gas mileage but stalling was too dangerous.

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