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Toyota Avalon Engine Questions

353 messages,  Last post on Nov 16, 2009 at 7:10 AM

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#248 of 353 noise in engine of 2000 avalon by ogunba Mar 28, 2007 (11:37 pm)
Hello. I recently observed a vibrating noise in the engine of my 2000 avalon. The noise cannot be heard from inside the passenger compartment but only when in front of the hood and when the engine is revved between 1500 and 3000 rpm. Is this serious or what? i have not had any major issue with the car in the last 30000 miles. Pls HEPL!!!
#249 of 353 Re: engine sludge settlement [rpfingsten] by t_rucky Mar 29, 2007 (4:59 am)
Replying to: rpfingsten (Jan 13, 2007 4:48 pm) There was a lot of hype and considerable misrepresentation about the so called "sludge" issue. My experience with a 2000 Avalon XLS(currently 168,000 miles, and purchased new) is very likely a much more typical experience. An article in another popular site best describes the issue IMO. Hope it helps put your mind at ease:   "Toyota Engines - The Sludge Problem   Both four-cylinder and six-cylinder Toyota engines have experienced oil gelling or "sludging." This has even been reported to affect cars that are only a couple of years old. Before buying a used Toyota, it may pay to look under the valve covers for "sludged" oil. Blue smoke may be one symptom. We recommend use of synthetic oil.   What causes the problem? In some situations, oil additives are burned off or otherwise made useless; then oxidation occurs and various pollutants congregate in the oil, producing sludge and varnish. Originally, it was thought that the oil was being "burned" by excessive heat, but the problem appears to be caused by problems with crankcase ventilation, at least in some cases. The problem is not particular to Toyota and Lexus - Mercedes,Saab, BMW, Volkswagen, and Chrysler have all had problems (Chrysler's with the 2.7 V6, and cured soon after it surfaced) - but Toyota appears to have been afflicted more than any other automaker, and it affected both V6 and four cylinder engines (built from 1996 to 2001), but still, only about 1% of cars made appear to have had problems (keeping in mind that reported cases are probably fewer than total cases). However, any engine by any manufacturer can be damaged by the problem if reasonable care is not taken.   Making it worse, the volume of rubbish in the engine (including oil that's become heavy and burned, or sludged) can plug filters, the oil pickup screen, and oil passages, causing precisely machined parts to fail. Toyota's solution has been to extend warranties on the engines of these cars to eight years and unlimited miles, but originally blamed the owners for extending time between oil changes, and for a time refused to pay at all for engine damage. Mercedes raised their warranty to 150,000 miles after a lawsuit. The moral: keep your oil change receipts (or have oil changes done by a dealer) and use synthetic oil."
#250 of 353 Re: 99 AVALON Check engine light [farriz] by wig1 Apr 14, 2007 (2:44 pm)
Replying to: farriz (Jan 12, 2007 7:21 pm) Hi,   I have a 2000 Avalon XLS and the engine "Check" light came on. How did you find out the code number Po446?   Thanks,,Al Replies to this message: fin (Apr 14, 2007 3:00 pm)
#251 of 353 Re: 99 AVALON Check engine light [wig1] by fin Apr 14, 2007 (3:00 pm)
Replying to: wig1 (Apr 14, 2007 2:44 pm) To wig1:     Code Make Description  P0446 Generic Evaporative Emission System Vent Control Circuit   Exactly what this means, somebody else will need to tell you. Hope it isn't serious.
#252 of 353 Re: Avalon 06 Limited (New 2 Mo 360 Miles) Problem [lavalo] by paxlynn May 14, 2007 (8:35 pm)
Replying to: lavalo (Apr 28, 2006 8:38 am) More then a year later! We have a 2006 Avalon Touring and after a few months of ownership had to replace the fuel tank as a result of contanimated gas.Long story shorter, we got premium gas at the regular station and despite fuel tests and so on.... we had to replace the fuel tank and incur the rental cost for three weeks. All in all a total of approx. $4000.00 after paying aprox. $41,000.00 for the vehicle. If you were lucky enough to come to any solutions, I would appreciate you sharing your wisdom. P.S...This is our 4th Toyota, so I had faith. Thank you in advance for your input.
#253 of 353 1996 Toyota Avalon Check Engine light is on by huy67_ca May 21, 2007 (7:40 am)
Can some one tell me how to fix this or turn it off the "check Engine Light" . It failed the SMog check for the light is on, otherwise everything else pass... Thank you in advance
#254 of 353 Vehicle Skid Control and Vacuum Switching Valve by bws950 Aug 14, 2007 (8:23 am)
My wife and I recently bought a 2001 Avalon with 100k on it, and then drove it about 1800 miles on our honeymoon. Halfway through the trip, the check engine light came on, along with the VSC and VSC Off lights. We drove the rest of the way home without incident (though the brakes feel a little jittery occasionally, but that may just be normal). We bought the car from my inlaws and it hasn't had this problem before. I took it to an independent mechanic, and it failed the emissions test. He told me there was a problem with the Vacuum Switching Valve (about $200 to replace - maybe he was just replacing the cap?) and that fixing this could solve both the check engine light and the VSC issues. I know nothing about cars, but that seems a bit strange to me. Are the two related? What should I do? Replies to this message: mashoud (Sep 19, 2007 7:23 am) mdeal (Aug 02, 2008 11:06 am) mashoud (Aug 02, 2008 5:26 pm)
#255 of 353 Oxygen sensors by obafunque Sep 04, 2007 (4:31 pm)
During 2005 I had engine lights on due to oxygen sensors bank 1 and bank 2. I replaced both and after awhile lights went off. Now, after two years, same problem, same codes P1135 and P1155............ is that a normal situation or something else is going up with the car? I have 118,000 miles an trying to keep the car in optimal conditions. Any suggestions? Fixing the car at the dealer cost > $600.00......please let me know.
#256 of 353 Re: Vehicle Skid Control and Vacuum Switching Valve [bws950] by mashoud Sep 19, 2007 (7:23 am)
Replying to: bws950 (Aug 14, 2007 8:23 am) You may have already found the answer??? However, we too have a 2001 XLS with 86k and exactly the same thing happened. Car continues to work normally and if you disconnect the battery cable for a few moments and reconnect, the lights will go away for a few days. Anyway, took the car to Toyota dealership. Diagnosis: For engine light and VSC light on-- Codes: P0440, P0441, P0446        EVAP codes, needs V S V. Replaced rear VSV part no 90910-12264 Valve, switching $73.70 cdn.        Metric 6-bolt 6mm 0.76cents        Metric 6-nut 0.44cents        Hose clamp HS32 0.99cents LABOUR $43.77 Total cost: $119.66   Trust this helps. Pretty sure it would probably cost $50 D.I Y.
#257 of 353 98 Avalon Engine stutter. Check Engine light by gloucas Oct 02, 2007 (10:27 am)
My 1998 Toyoto Avalon XLS with 91,000 miles recently started stuttering when I accelerate suddenly or accelerate when going uphill. Today I noticed it began to lose power when I was going up a hill then the check engine light came on. I parked the car and let the engine cool down for about 90 minutes. When I restarted the check engine light came back on and the loss of power was very noticeable.   Any ideas what this may be? (The problem seemed to start just after my 90,000 mile service a few weeks ago).

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