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Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "Engine Light Stays On (Oxygen Sensor Problem)", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
Does anybody have problems with their check engine light coming on? I have just returned from the Toyota service department for the 3rd time in the past two months. One time was for a blown oxygen sensor but, the other two times were because "the gas filler hose was loose" and "the gas cap was loose." It sounds like Toyota has created a way to increase work for their service departments. Even if I check and tighten the gas cap, the only way to get the light to go off is to have it "reset" by the service department at $23 a pop.
I had the Check Engine light come on in my Tundra twice. Both time it was from the Oxygen Sensors. There are two seperate ones in the Tundra and when one goes the other is not far behind. I had them both replaced and the light has not come back on.
Originally posted by rbeye
Even if I check and tighten the gas cap, the only way to get the light to go off is to have it "reset" by the service department at $23 a pop.
Just disconnect the battery for a few minutes and that should reset the check engine light. Of course you'll lose all if your pre-sets. (clock, radio, trip meter)
I have a 2000 Tundra SR5 4X4 V8. The engine light comes on and stays on. I even disconnected the battery for two minutes to clear the stored memory in the computer and the light went out for a while but came back on. The engine and drivetrain runs just fine but the light stays on. Has anyone here had similar problems with the engine light staying on? And if so, what was causing the engine light to come on on your Tundra?
Also, where can I find a diagnostic code scanner for the Tundra V8? Any help, suggestions would be greatly appreciated. Thanks in advance!
Generally means there's a problem, I'm guessing your O2 sensor, though it's really just a guess. Take it in and have it checked out since you've already shown it's not a fluke problem.
Originally posted by Tundra2UZ I have a 2000 Tundra SR5 4X4 V8. The engine light comes on and stays on. I even disconnected the battery for two minutes to clear the stored memory in the computer and the light went out for a while but came back on. The engine and drivetrain runs just fine but the light stays on. Has anyone here had similar problems with the engine light staying on? And if so, what was causing the engine light to come on on your Tundra?
Also, where can I find a diagnostic code scanner for the Tundra V8? Any help, suggestions would be greatly appreciated. Thanks in advance!
It could be any of the smog components, but if you're at between 20,000 and 35,000 miles you've probably had an O2 sensor go out. For some reason they have a tendency to go out. Hopefully it's not a 30,000 mile thing..... I don't think so. If not, they'll upgrade the sensor I'm sure (if they haven't already). I posted the part number for the part you'll probably need a few months ago, but you'll need a computer scan to double check. There are a number of sensors.
It should be covered under warrantee if you're within the warrantee period.
I had the same trouble a few weeks ago. It ended up being an O2 sensor.
I took it to a local shop, where they read the code for $45. Some folks posted about readers (well, computer software and cables) that you could buy reasonably cheaply. I wish I had done that instead.
There are 4 O2 sensors. List price is about $130 each, I believe. I bought mine for about $71 on the internet. Bosch, same as I took out.
Rear sensors can be removed and changed in 2 minutes by anyone. Easy, easy job - bless you, Toyota. Wonderfully, you can get under the truck without lifting it! Man, I can't even get most floor jacks under my BMW.
Front sensors are harder to get at, need some handy experience and tools to get them. Darn you, Toyota! Drivers side, two crescent wrenches worked very well. One to grip the sensor, the other to turn the gripping wrench. Passengers side, one wrench and a whole lot of cussing finally got it off, but I don't like that solution.
Bank 2 Sensor 1 is front passenger side. Figure out the code from there.
Connecting wire length is slightly different, left side to right.
If you change the O2 sensor yourself make *sure* that you don't get any anti-seize on the sensing tip when you put the new one in. Otherwise you'll have to pull it out and clean it off (good luck....).
Funny you mentioned about Autozone's free diagnostic service. I just heard about it on the radio today and had the diagnostic service done there. The find confirmed my suspicions about a faulty O2 sensor. Code #155 came up and indicated that there was indeed a faulty O2 Sensor on the #2 bank. Does anyone know where or which side(driver/passenger) the #2 bank is located? Thanks again for all the responses!
I had the same check done today. Error code #155. The guy at Autozone said that it was an O2 sensor, but not which one. Does #155 mean the #2 bank ? Thanks Charles
Bank 2 Sensor 1 - All the engine codes are listed in the "Garage".
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I have replaced both front O2 sensors twice. First time at around 50K, second time around 95K. Each time I replaced them as a pair assuming that if one failed, the other would not be far behind. Both times it was Bank 2, Sensor 1 (passenger front) sensor that failed first.
virtually all our check engine lights are for the front upstream o2 sensors. Usually pass. front (bank 2 sen 1)
By the way, since OBD II came out in 1996, the old disconnect the battery to clear the code trick no longer works. Stays stored until cleared by scan tool.
Originally posted by pellegran virtually all our check engine lights are for the front upstream o2 sensors. Usually pass. front (bank 2 sen 1)
By the way, since OBD II came out in 1996, the old disconnect the battery to clear the code trick no longer works. Stays stored until cleared by scan tool.
Check Engine Light!!!
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