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Oxygen Sensor

code2319code2319 Posts: 2
edited March 25 in Toyota
Hello All,

This morning my wife took my Tundra out to the post office and got about 1-2 miles when the Check Egine light came on. She turned around and came back home and I took my 2001 Tundra 2WD SR5 AccessCab to the nearest Toyota dealership's service department.

An hour and a half later I was informed I was ready to go. When asked what happened, they said the Oxygen sensor had failed and they warrantied the repair. I asked what caused it to fail and they had no clue, but added it wasn't uncommon on the Tundra V8 line.

Since TundraSolutions does not allow non-paying subscribers and guest to do searches or posting in the Technical section of that site (I understand perfectly, as it would be a valuable resource), I am looking elsewhere.

Has any other Tundra owner had a problem with an O2 sensor, or any other sensor going out? I have about 27K miles on the truck, of which 90% are non-rush-hour interstate driving. I change the oil regularly with fully synthetic oil and performance filter and never had any problems.

Last Saturday, I got lazy and instead of changing the oil myself, I took the 7-quarts of Mobile one and appropriate Mobile 1 filter to this very same dealership to have them change it (and they did for $9.95!). I also had them rotate the tired, but they screwed that up by rotating only two of the four tires.

Just curious. No problems until after I have someone do something. Coincidence?


  • dustykdustyk Posts: 2,926
    I know two people who own a Tundra and they have both had the same problem. One fellow twice. I can't verify, however, if this is a "common" problem.

    There is a Tundra board here at Edmunds. I'd post the same question in there and see if you solicit any responses.

    Best of luck,
  • ryanbabryanbab Posts: 7,240
    just wondering but the tundras take 7 qts of oil for a change?
  • PF_FlyerPF_Flyer Pennsylvania Furnace, PAPosts: 5,854
    You might want to check over on the Owner's Clubs boards in the Toyota Owners Clubs.

    You'll find the Toyota Truck Owners: Problems & Solutions topic there!

    PF Flyer
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    Need help navigating? - or send a private message by clicking on my name.
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  • No, seven quarts are not required. A little over six quarts. In order to 'be prepared' I brought more than what was needed. :)

    BTW, I thought I has posted to the Tundra board. Did I not do this? The 'You are here' says Town Hall>Toyota>Tundra. I'll post the same in the Owner's Clubs, too!
  • brucec35brucec35 Posts: 246
    I've just had my 3rd O2 sensor failure, this time out of warranty, so I'm replacing both remaining ones myself since I'm sure the 4th will go soon. I've read that it's about a $200 repair at the dealer(each), or $150 for the parts-only, but I ordered the parts online for $116 each and will be doing it myself. Looks real easy, they're attached to the exhaust at 4 points, two in front of the catalytic converters, two after them. The only problem you will have is testing to see which ones are bad.
    So yes, this is a "common" problem with the Denso sensors Toyota uses. But if this is all the major trouble I've had with my '00 Tundra in 40,000 miles of heavy duty use (towing/hauling daily) I can't really complain. Other "problem areas" would be the drum brakes, that got out of round at only 20K miles, but they fixed that for free. Oh yeah, my belt is also a little squeaky when cold. Replacing that with a Goodyear Gatorback belt for $27.
  • If your o2 sensor is giving you problems, don't just buy a new one, as it may be covered under emissions for 72,000 miles. Not sure about this but worth looking in to.
  • brucec35brucec35 Posts: 246
    they won't cover it, even though they probably should.
  • I too have had the sensor problem, mine at 70,000 miles on a 2001. After my check engine light came on I took it in and they want to replace all 4 sensors at a cost of about $800.00 total.
    My question, any harm done in not having these replaced for a while?
  • Yessir, now the O2 sensor on the passenger's side on the exhaust manifold has failed. Also, the sensor froze in the manifold and they are replacing the exhaust manifold, too. I'm in an insulting Chevy rental (against my will) as the repair will take +5 hours and it was 3PM when they made the determination.

    So, being that it has only been two months since my first O2 sensor I wonder if this isn't a chronic problem we are seeing. Two sensors gone bad and only at 28400 miles in 18 months of ownership for this vehicle I bought brand new.

    BTW, the sensor and manifold repair bill (under warranty) will be about $600.
  • brews1brews1 Posts: 40
    Just picked up a new V8 Tundra. Is the O2 Sensor an ongoing issue or has it been fixed on the 2003.
  • At about 45,000 miles (2000 Tundra) one of the O2 sensors failed. I asked the dealership if this was covered under the emissions warranty, they said no. I asked what would happen if I didn't replace the sensor. They said it could damage the catalytic converter. I asked if the catalytic converter became damaged as a result, would IT be covered under the emissions warranty. They said yes. Go figure.
  • dkt99dkt99 Posts: 2
    Had one go bad at 17,000 and another go bad at 23,000 miles. Cronic problem with this type engine and they are aware of it. If not repaired the computer will adjust your fuel flow and you will get diminished gas milage.
  • coolguy2coolguy2 Posts: 1
    I have a 2000 tundra w/42000 miles and the first o2 sensor recently went out. Parts and labor cost nearly $300. Luckily I had the extended warranty and only had to pay the $100 deductible. This really suck, but I guess it is better than paying the full $300. I also checked on the emission warranty on the sensors. It appears that the sensors only have a 36,000 mile or 3 year warranty on it. Other than that by tundra is running smoothly. By the way Toyota had to replace the entire calibers and brake system on my Tundra at 30,000 miles. I knew there was a problem when the truck vibrates when I use the brakes. The dealership told me that the reason it vibrates was because the calibers was too small for the truck, whatever that means. Anyone with similar vibration problems should get it check out as soon as possible before you have to pay to get it fix.
  • Both of my O2 sensors have been replaced under warranty. I have approx. 22,000 miles on the 2001 Tundra V8 SR5. When I asked the service writer what may have caused the problem, he said it could be the gas that I'm using, which is either Mobil, Shell, or Chevron 87 octane. Has anyone heard of poor gas quality causing O2 sensors to go out or is this simply a common problem with this engine?
  • I recently replaced two O2 sensors in my 2000 Tundra V8. The first failed in February at 49,000 miles and the second almost exactly 1 month later at 51,000 miles. Both were covered under warranty. The service rep told me that the O2 sensors frequently fail in the V8 engines. The sensor in the exhaust manifold is particularly problematic, since removal often strips the threads in the manifold, which must then be replaced as well. Luckily that didn't happen for me. That's the only problem I've experienced in the 2 1/2 years I've owned this truck.
  • gator36gator36 Posts: 294
    The service rep is full of it. Your comment.
    "The service rep told me that the O2 sensors frequently fail in the V8 engines."

    My last truck had 150,000 miles on it before I traded it in and never had to replace an o2 sensor. That was a 97 model year. My current truck has 50,000 miles and no o2 sensor problems. There seems to be a trend with the Toyota's.
  • akjbmwakjbmw Posts: 231
    We have to remember that the "service rep" at most dealers does not seem to acknowledge the existance of any make of vehicle other than what they are "servicing". Therefore, there is no need to mention their potentially superior attributes. 'Course, they will be glad to pass on any fables of shortcommings in other brands.

    What is that... oh yeah, perspective.
  • My husband had a 2000 Tundra by 50K miles we had replaced 3 O2 sensors. He now as an 02 Tundra with less than 27K and has had to already replace 2 O2 sensors. By the way we use Amoco gas almost exclusively
  • my husband has found out that yes the O2 sensor will make the gas mileage go down.
This discussion has been closed.