Last post on May 13, 2013 at 12:52 PM
You are in the Toyota Sienna
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Toyota Sienna, Van
Jan 10, 2011 (4:19 pm)
I have a 2004 Sienna with higher mileage (248,000). I have been having an issue with CEL coming on. It only comes on after the car idles for at least 10 minutes. The codes are always the same P0171 and P0174 system too lean bank 1 & 2. I have a code reader that I can reset the codes with. The CEL will not come back on for over 1000 miles-provided I do not let the van idle. My mechanic friend suggested I clean the MAF which I did-no improvement. He then suggested that I change this part out-which I also did with a rebuilt part. It seems like the CEL takes a little longer to light-but it still comes on after any extended idle time. The CEL never lights when driving -only at idle.
I have seen suggestions that the coolant temp sensor may be causing this. I have also heard that a clogged fuel filter may exhibit these same symptoms.
Before I venture any further with replacing parts in search of a cure I would like to hear from the fine members here.
Thanks in advance.
#102 of 126 My 2002 Toyota Sienna won't clear the computer!
Feb 25, 2011 (7:49 am)
I have a really frustrating situation. My 2002 Toyota Sienna won't pass inspection.
Several weeks ago, I had a check engine light come on before the inspection that showed I needed a new air sensor near the cat. conv.
Okay, that was replaced two weeks ago. Since then, no more lights show on my dash.
The mechanic said that his shop computer still shows my car won't clear.
He initially said, two weeks ago, that "driving it" was a remedy for this. Well, I've since driven several hundred miles, and though my dashboard check engine light remains off (I'm not showing any lights anymore at all.)....the inspection computer still won't apparently clear.
What do I do? Even the mechanic has no clue what I should do next. Drive it some more and bring it back again? I've done this twice now, and after several hundred miles, still, though no check engine lights are showing, I can't get my Sienna inspected in N.Y. State. Meanwhile, I'm driving with an expired inspection. I'm real sure that a policeman would believe I've tried my hardest to inspect this. Yeah, right.
If even the mechanic doesn't know what I should do....then?...What?....Anyone who has any help or guidance on this would be greatly appreciated!
#103 of 126 Re: My 2002 Toyota Sienna won't clear the computer! [honjugo]
Mar 04, 2011 (6:53 am)
It's not the number of miles driven that will make your van ready for inspection. There are certain "drive patterns" that must be completed, for the ECU to test your catalyst operation, for example. Conditions that need to be met are for this one test: engine warmed up, drive 15 minutes, varying speed between 30 and 45mph. Do this twice.
Without knowing which ECU monitors are not ready, I can't help you further. Your mechanic should be able to tell you, though. This is basic. Google "Sienna readiness monitor drive patterns."
Good luck--hope you've already passed inspections.
#105 of 126 Auto AC trouble codes
Apr 05, 2011 (8:57 am)
The AC on my 2004 Sienna XLE stopped cooling. I ran the on board diagnostic function to display trouble codes for the climate control system. I received code 21. My Haynes Repair manual indicated that a 21 indicates trouble with the "solar sensor circuit". What is the solar sensor circuit? I also received a code 24. Haynes does not list a 24 trouble code. Any ideas on what's going on? Also how do I determine the low side service valve for the AC?
#106 of 126 Re: My 2002 Toyota Sienna won't clear the computer! [honjugo]
May 25, 2011 (8:09 pm)
did yr mechanic check the oxygen and air fuel sensor? my 2004 sienna didn't pass inspection in 2009. i paid $2200 to fix it..... fixed the sliding door $2300 in 2010....they said the steering wheel has problem now.....i'm still thinking should fix it or not, it costs $2500..... what the "xxxk"sienna.......
#107 of 126 Re: 2004 sienna check engine light [samnoe]
Jul 05, 2011 (5:34 pm)
engine light came on,vsc and trac off lights came on too,i took it to the dealer toyota capistrano where i bougth it new now its 34000 miles in it,the whole day it sat there in the afternoon they said its done so i went home as soon i got out of the dealer the same lights came back again,so turn around and take it back inside the service yard they said they dint find the other problem they change one part but they said onother park needs to be change how come desame problem did they change the wrong part ? or they dint do anything,but i've heard once you reach 30000 miles this automatically come out evry 30000 and it just need to reset something whatsoever is that,thers no actually parts to be replace am i correct,pls give me information about this problem.
#108 of 126 Re: 2004 sienna check engine light [gsnagesh]
Jul 05, 2011 (5:46 pm)
is the gas cap has something to do with that damn indicator warning light what for or its just made like that so that they can drain money ,time,on the costumer it doesnt make sence a loose gas cap can do damage just like that they should correct this problem,whoever idea is that.
#109 of 126 cannot increase engine speed + check engine light vsc trac off
Aug 22, 2011 (7:44 pm)
I seemed to have a battery problem today, was able to get a boost and get started. However, I was unable to accelerate beyond 2000 rpm. The "check engine", "vsc", "trac off" lights came on. I tested the battery, replaced it, lights are still on, still no acceleration. Cannot drive over 25mph.