Last post on Dec 04, 2013 at 8:09 PM
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Toyota Sienna, Van
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#75 of 109 Toyota Sienna 2000
Jan 05, 2011 (4:51 am)
I have a Toyota Sienna 2000 with 260k miles, and engine check light has been on for ~ a month already. Plan to bring the van to a shop, and would like to find out what are other parts/points that need to be checked before and during the engine check. If there is something that I can do it on my own in my garage would be good if you can share them to me Thanks.
#76 of 109 why so long?
Jan 05, 2011 (2:28 pm)
Take it to any repair shop--most all have dignostic meters that plug into your computer system and tell you what is going wrong. I can't imagine letting a month go by watching the light and waiting for something to go bang or thud to a stop. DO IT!!!
#77 of 109 Re: 2002 Sienna LE - ECM Replacement [johnsonjhn]
Feb 10, 2011 (3:31 pm)
This is an older message that reflects a design defect in the original ECM on 2001-2003 Siennas. It is still worth talking about, because effects of the defect can show up late and cost the owner a lot. Toyota admitted the defect in a 2005 TSB (EG047-05) but did not notify owners. The original ECM versions worked correctly except that they could generate a false p0420 code when, in fact, the catalysts and associated sensors were operating correctly to limit emissions and control engine parameters. Toyota's fix (but only for owners who had the specific complaint within the qualifying years/miles) was to replace the ECM under warrantee with a redesigned one which would only generate the p0420 code when it should. The vehicle can be driven with the MIL on for this reason, but: 1) the engine is always in open loop so it will use extra fuel and may gradually lose some of its reliability due to oil dilution, slow warm up, etc.; 2) the catalysts may eventually die from running too rich; 3) emissions are too high; 4) you cannot pass state emission inspections; 5) if a meaningful code occurs you will never know and may suffer costly unnecessary damage because the MIL is already on. Some "fix" the problem by a workaround such as disabling the MIL or installing an O2 sensor simulator, but these leave the engine in open loop with all the attendant risks mentioned...
There are several unfortunate aspects of this problem. Toyota would replace the ECM for free within 8 years and 80,000 miles, but up to 5 of those years had gone by before they admitted the defect. No doubt many owners replaced sensors and catalysts several times, only to have that p0420 frustratingly pop up again within a few months or thousands of miles (in the most painful scenario, this would happen just out of warrantee...) Most owners, despite having a defective ECM from day 1, were lucky (or unlucky) in that their catalysts/sensors/etc. stayed no-code-good (as opposed to just good-good) for a long time. While many "working" examples of original ECMs are available cheap on the used market, the redesigned ECMs seem unavailable. It cannot be that the upgraded vehicles are immune to being junked, which suggests that a great many owners may have replaced defective ECMs at their own expense. The sad thing, of course, is the cost of ~$1600 plus labor. Though specialized and ruggedized, these computers are relatively simple and made in large numbers. I bet Toyota pays less than $100 for each. How much goodwill could they have earned by replacing the defective ECMs with no limit on miles and years?
#78 of 109 Re: Timing Chain, 2 port intake [fccn75]
Mar 08, 2011 (5:44 am)
I realize that this is a very old question to be responding to, but I might have figured out the answer. We just purchased a CPO '08 and drove a few before picking this one. Each one we drove seemed to have a different noise 'issue'.
The set of complaints listed on page 2 & 3 was related to resonating vibrations heard/felt at some narrow RPM bands on 2007 models with the new 2GR engine. When crawling around underneath, I noticed on my '08 that just behind the spare tire were two heavy 'dumbells' clamped to the exhaust pipe. Were they there on the '07? I'm wondering if these are dampers added to change the resonance of the shaking pipe. Perhaps adding / changing the weights could null out or shift the noise to a less objectionable RPM? Just a thought....
#79 of 109 Re: 09 Sienna engine noise [wisjeepman]
Mar 08, 2011 (6:31 am)
Again, two new items that I came to find out about my 'new' '08 related to engine noises:
Quoting from my car's service log
1) Driveability - Customer states there is a ticking noise from engine area. Ticking sound from B2 exhaust camshaft VVTI controller. No codes present or stored. Technician replaced B2 exh camshaft VVTi controller.
2) LSC 90k campaign - Variable Valve Timing Oil Hose replacement - completed.
This may be your noise!
I found a campaign letter on a Camry board that was issued for the 2GR engine. It states that other vehicles may be impacted, and the recall could be widened to a broader range of vehicles...
Q2: What is the cause of this condition?
A2: The rubber portion of the engine oil supply hose for the VVT-i actuator may develop a pinhole. Over time, exposure to small amounts of corrosive gases from the positive crankcase ventilation (PCV) may cause this pinhole in the hose to expand. As a result oil may leak from the hose.
Q3: Are there any warnings that this condition exists?
A3: Yes, this condition may cause abnormal engine noise and/or the oil pressure light to illuminate.
#80 of 109 Re: 2002 Sienna LE - ECM Replacement [steven52]
Mar 08, 2011 (9:31 am)
For more than 3 years I have had a perfectly good, brand new, oxygen sensor stored in the spare tire wheel well of my '01 F/awd RX300. The fault would not stay cleared so I purchased a new oxygen sensor to install.
I guess the threat of being tossed into the waste can caused the old one to perk up and fly right...;<)
#81 of 109 Re: Engine Noise in Cold Weather [zakki]
Jun 11, 2011 (3:02 pm)
Was the problem fixed?
I am getting the same noise from my 2008 Sienna.
#82 of 109 Issues with 08 Sienna
Aug 08, 2011 (4:55 pm)
My 08 sienna has had the check engine light, VSC light and the TRAC OFF light come on all at once twice in the last month. This last time the check engine light was flashing. What does this mean?? The dealer maintance shop is trying to tell me it is bad tires but that doesnt sound right. Any insight would be nice! Thanks!
#83 of 109 Re: Issues with 08 Sienna [smward89]
Aug 11, 2011 (4:39 am)
A flashing chk engine light should not be ignored. A steady state light means there is a stored code. It could be something current, but most likely it is an 'event' that happened in the past. A flashing light is warning you about something that is happening NOW and could cause damage. This quite often happens with a cylinder misfire, and that could lead to major engine damage.
Bad tires? Is this an AWD van? Toyota is much more forgiving than say Subaru on the issue of mismatched tire diameter, but I suppose that if you were way off it might log an error. The skid control and traction control systems do use wheel speed sensors as an input, and it might not like a constant rotational difference if a tire was way off from the others.
#84 of 109 Re: Issues with 08 Sienna [fibber2]
Aug 11, 2011 (6:11 am)
Its a front wheel drive. All of the codes that came up were misfires in all six cylinders and the tires all match and we had them rotated and balanced to see if that fixes the problem but I don't see how they are blaming perfectly good tires for the misfires. The check engine light was flashing so I stopped immediately.