Last post on May 13, 2013 at 11:52 AM
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Toyota Sienna, Van
#11 of 126 False Check Engine and VSC warning lights and how to reset
Dec 22, 2006 (11:51 am)
After the 2006 blizzard of Colorado, my 2004 Sienna AWD got stuck in the deep snow for a few minutes. As I maneuvered to get it out of the snow, both check engine light and VSC light came on. Without knowing better, I sent it to Boulder Toyota. After reading the codes, they said nothing was wrong with car and it is normal to have these lights come on when the car gets stuck and wheels spins without moving. The punch line is that they charged my $45 to reset those lights that were false alarms to begin with! I think that Boulder Toyota (part of Larry Mill Toyota group) is a crook disguised behind a friendly face.
For $45 the service manager told me how to reset the lights DIY: Under the instrument deck, there is a fuse box. Remove the one labelled "EFI" for 30 seconds. That's it. Hopefully you all benefit from my tuition. But only do so if you are sure that those lights are false warning as in my situation.
#12 of 126 Re: False Check Engine and VSC warning lights and how to reset [ceo1]
Jan 03, 2007 (6:32 pm)
I would bet that you were only able to "maneuver" it out of the snow after the VSC light came on meaning VSC & Trac were then disabled. Prior to that traction braking and engine dethrottled likely prevented you from braking "free".
Yes, it is normal for the VSC to "fault" after a long period, ~45 seconds of continuous VSC or Trac activation, longer period for semi-continuous. The one in my 2001 AWD RX300 will reset on its own after a period of cool down time.
But the CEL is another matter entirely, I don't think that was normal for your circumstance.
#13 of 126 Re: False Check Engine and VSC warning lights and how to reset [ceo1]
Jan 19, 2007 (11:08 pm)
So on Tuesday we bought our Sienna CE ' 06, with only 44 miles on it. We live in the Dallas-Fort Worth area and had bad weather for a couple of days. But after having the vehicle only 2 1/2 days - the "check engine light" came on. I have checked the fuel cap...all good. Haven't refilled gas yet. Is it safe to say and do - computer error and just pull out the fuse and then put it back in?
#14 of 126 Re: 2004 sienna check engine light [gsnagesh]
Jan 27, 2007 (7:53 am)
The light should reset on its' own after 40 "trips". If there is no longer a "leak" caused by a loose cap. The OBD ( on-board diagnostics )II system checked for leaks in the fuel tank vapor purge system and saw a "leak" and turned on the MIL ( malfunction indicator light ). A "trip" is variable - depending on the recognized "fault", but whenever this happens to me it may take about 2wks to reset the MIL - 3-4 starts/trips a day. It will not affect the operation of the vehicle as long as there is no "current fault"
#15 of 126 Re: False Check Engine and VSC warning lights and how to reset [carolinesfolks]
Jan 27, 2007 (7:59 am)
It probably won't help, the "code" may be a "hard code" and is not likely to be "erased" by a mere power supply interruption. If you live here in DFW, you can take it to AutoZone and they can "read" the fault, but not erase it. That way you can see what it is. It may require you take it to the dealer for diagnosis/repair - likely a warranty repair - especially since you seem sure the fuel cap was tight before the light illuminated. If the fault is no longer present, it may deactivate the light after about 40 "trips" - likely about 2wks.
#16 of 126 Re: 2004 sienna check engine light [ateixeira]
Jan 27, 2007 (8:20 am)
Basically, they are right. Most people/companies will do the right thing only under threat of punishment. If the light is on, it will most certainly have an affect on emissions. Most people have no idea of the contents of their cars' owners manual.
#17 of 126 ABS, VSC, and TRAC OFF lit up on dashboard for the 2nd time after service
Feb 03, 2007 (7:07 pm)
I have less than 9500 miles on a brand new 2006 Sienna XLE. It has been in the shop 4 times on various problems. The latest is ABS,VSC and TRAF OFF lit up on the dashboard. The service Dept. replaced ABS/TRAC Actuator Assy. Does anyone have the same issue with your van, and btw I'm not impressed with the MPG either...
#18 of 126 Re: ABS, VSC, and TRAC OFF lit up on dashboard for the 2nd time after service [saafedt]
Mar 24, 2007 (7:26 am)
I have Sienna XLE 2004 model with 40,000 miles on it. My wife drives the van. She called me while I was out of town on a business trip and reported the same problem (Check Engine, VSC, and Trac off lights on).
After one or two trips to drop and pickup the kids at school, the light automatically went off. I am not sure why the light came in the first place; I am puzzled.
#19 of 126 scanned trouble code # P1135
May 13, 2007 (5:28 am)
I too have the check engine, vsc & trac off lights on .
I went to auto zone , atre scanning , the code indicates
air/fuel sensor heat circuit response. (bank 1 sensor 1)
it says probable causes
1. open or short circuit condition
2. poor electrcal connection
I would guess to start looking at the electrical connections at bank 1 sensor 1 , but what is that ?
cylynder 1 or what .
I 'd appreciate any help .
#20 of 126 trouble codes
May 29, 2007 (7:40 pm)
turns out , the trouble code indicated bank 1 sensor 1 . air/fuel sensor heat response circuit.
these are toyota's version of an o2 sensor .
the heat circuit is added to make it get to operating tempature faster .
on the sienna ,there are 3 .one on each exhaust manifold & one downstream of the cat. they all work in conjunction w/each other to make adjustments.
bank one is the first , next to the firewall, two is in front just behind the radiator , & three is last after the cat.
at toyota , the sensor was $210 so, I bought it on the net from a toyota dealer fo $158, delivered. comes w/ a dab of antisieze on the threads.
you're supposed to check the 02 sensor w/a voltage meter . there are paramaters to check if the part is in fact bad b4 buying an expensive replacement .