Last post on May 21, 2013 at 11:28 PM
You are in the Toyota Highlander
What is this discussion about?
Toyota Highlander, SUV
#4580 of 5315 Re: Catalytic Converter Issues - 2001 V4 Highlander [worthflorida]
Aug 24, 2009 (4:33 pm)
Thank you for your message. I am taking it to an older mechanic that's had his own shop for 60 years in my town. I spoke with him today and he, like you, is certain that there is a problem either with the engine or an O2 Sensor or some other sensor. He said he could figure out where the problem lies and that would help with getting to the bruxt of the problem so hopefully, that will stop the purchase of so many converters. I do have the oil changed every 5-8000 miles which usually is every 6-8 weeks. I have it changed at the Toyota dealership and they know my car. My mileage is strictly highway miles since I drive 250 miles per day to and from work and I normally keep it between 60-65 miles per hour. Occassionally, I hit 70 mph. The odd thing is it continues to get 24-26 mph even while the check engine light is on. She's been a wonderful car and would like to keep her!
#4581 of 5315 Re: power window problem [bobcatcar]
Aug 26, 2009 (11:17 am)
My 2006 rear windows have BOTH gone off the tracks to the tune of $180 to fix. Any others having this problem?
#4582 of 5315 Re: Catalytic Converter Issues - 2001 V4 Highlander [texasgirl55]
Aug 26, 2009 (10:40 pm)
If you're getting 24-26MPG and don't have to have an emissions check I would just ignore the CEL since the only thing that appears to be wrong is that the converter is too weak to fully clean the exhaust gas.
If I were going to change anything it would be the "front" oxygen sensor because I suspect that with that kind of MPG you're more likely running to lean than any other problem.
#4583 of 5315 Re: Catalytic Converter Issues - 2001 V4 Highlander [wwest]
Aug 27, 2009 (7:45 am)
Sounds like you are driving at the correct speed for this engine. Yes the O2 sensor could be the problem. Less cost than a converter. Since your MPG is very good it does not sound like it is the converter. A bad converter actually gets plugged up and the engine will work very hard because of the high back pressure. A plugged up converter will cause acceleration to be very difficult as the engine fights the back pressure.
At one time on my 2002 Chevy Astro, as I idled or back up my driveway, I would hear a jingling noise and I could never find the source until one day the Check Engine high came on. Corrosion inside the cat. caused it to collapse at around 45,000 miles (80,000 mile warranty) and no cost to me for a replacement. The replacement at nearly 70K miles later, I'm not having any problems.
Please keep us informed.
#4584 of 5315 Re: Catalytic Converter Issues - 2001 V4 Highlander [worthflorida]
Aug 27, 2009 (8:31 am)
I am standing at autozone and they are saying the diagnostics is showing Bank 1 and Bank 2 Catproblems. Is there 2 converters on this SUV?
#4585 of 5315 Re: Catalytic Converter Issues - 2001 V4 Highlander [texasgirl55]
Aug 27, 2009 (11:49 am)
My Haynes manual indicates that there are 3 converters. 2 are attached to exhaust manifold near engine and the 3rd is under the car. Also, your engine is I4, not V4.
#4586 of 5315 Suspect...
Aug 27, 2009 (7:32 pm)
This is a V6...., bank 1 and bank 2.....
In which case that MPG is too good to be true....running VERY lean.
#4587 of 5315 Whining sound from engine
Aug 31, 2009 (5:55 pm)
I have a 06 Limited with about 70k. Car has been absolutely bulletproof to date. Tonight, about 4 miles back in the woods at dark thirty, I hear a fairly loud whining sound that seems to be comming from the engine bay. (V6). The sound varies with rpm and sounds the same in park, if I depress the gas. It is hard to hear at 50-60 mph, but is really obvious at low speed. Any ideas?
#4588 of 5315 Re: Whining sound from engine [stoneybroke]
Aug 31, 2009 (7:08 pm)
Being in the woods you might have kicked up a branch or twig and it is jammed up in the engine compartment. It might be rubbing on a pulley, belt or sticking in the generator rubbing on the commutator, AC compressor or power steering pump. Maybe something got stuck in one of the two cooling fans.
If the sound came up all of a sudden it could be something that was kicked up, mechanically it is something with a bearing or gear. Power steering pumps will make a noise but it changes when the steering is moved around.
Aug 31, 2009 (11:16 pm)