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2004 sienna XLE...rattling noise,chk engine/vsc light

2004 sienna XLE AWD 110K. had timing belt replaced at 95K. then at 109K A/C blowing hot air and engine heating up. found coolant leaking. mechanic said water pump cracked and should have been replaced with timing belt. replced water pump and a/c problem fixed. now after 1 month strange things happening from time to time....VSC and check engine lght coming on and off. seeing large puddle of water(not coolant) under van which seems more than normal. occasionally ac blows humid air for one minute then reverts to cool but no sign of engine overheating. rattling noise near front passenger windshield. A knocking sound from under van occasionally but van is driving fine. What could be the problem? Read something about a/c compressor failing but how would I know?

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  • 2 Answers

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Posted on Jan 02, 2017

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  • 1861 Answers

SOURCE: VSC and engine light on

The Trac light comes on automatically, in conjuction with the Check Engine Light. You need your vehicle scanned for DTC codes.

Posted on Sep 08, 2008

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  • 26 Answers

SOURCE: 2001 Sienna VSC/Trac/Engine Light

Toyota Specific Trouble Codes
P1135 Air/Fuel Sensor Heater Circuit Response. (Bank 1 Sensor 1)
If you have changed the proper sensor then you may need to have the cam shaft looked at.

Posted on Dec 16, 2008

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1 Answer

What does the check engine light and VSC light indicate for a 2004 toyota sienna xle?


Take it to a car parts store like Advanced Auto to get their free trouble code reading service.

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-Are you talking about air conditioning...?
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Mai

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Exhaust Converter-- (PO 420) -- may be melted inside and restricted

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1 Answer

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I have both lights on in my 2004 van also I have the engine light on. i took it to the dealer and they found the Yaw Rate Sensor (Vsc & TRAC) bad. The part is about$ 405 and is under the drivers seat. The other problems is the Catalyst System (engine light) about $1000 for parts.I have about 147,000 miles on my '04 and the problems started about 130,000.

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2 Answers

2004 toyota sienna engine and vsc light


well the check engine light on can mean many different issues its just a symbol telling you that your ecu (engine computer) has found an issue with your vehicle it is not a specific indicator of whats going on unless you get the codes pulled from your computer any autozone will pull the codes for free and some shops will also just call around they will not diagnose prob for free though it could be anything vacume leaks - o2 sensor bad ext....as far as your vsc being on most of the time when your check engine light comes on the vsc will light up also does not mean there is an issue with your vsc system....i work as a mechanic for a toyota dealer and see his all the time and check to make sure your gas cap is tight will set check eng and i see it all the time when custs forget to tighhten gas cap if its loose you can get the codes erased hope this helps!!!!

Jan 04, 2009 | 2004 Toyota Sienna

1 Answer

VSC and engine light on


The Trac light comes on automatically, in conjuction with the Check Engine Light. You need your vehicle scanned for DTC codes.

Aug 11, 2008 | 2008 Toyota Sienna

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