Question about 1998 Toyota 4Runner

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Where do I find the sensors to replace them? I need a diagram.

My check engine light won't go ogg. I checked the gas cap and retightened it and did about 15 engine starts the light is still on. I have been told to replace teh oxygen sensor. Where is that located in my 1998 toyota 4runner?

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It is located on the exhaust pipe. One on each bank normally front and rear. If you go to autozone, they will do a free diagnostic and let you know exactly which one is bad. They are easy to get to and replace, you just need to know which one is bad.

Posted on Jun 23, 2009

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Posted on Jan 02, 2017

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I have a 2011 chev Malibu 2.4 the engine light came on the scanner said it was P1400E code Iim asking what is it? Can you help


Rafael,

It can mean a lot of things. Did it just recently come on? For instance after filling gas tank? If yes, then remove the gas cap and retighten to see if that helps. If no, then gas caps are $5 or so at an autoparts store. Replace the cap and see if that helps.

After this, the fixes can be MAF sensor dirty or blocked. Have you performed any service at all on the engine lately? Washed the engine?

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Check engine light came on and code said to replace gas cap, did that and two weeks later check engine came on same code, then one day fuel light came on and gauge went to fueull then empty 2 times , now...


You wouldn't think a gas cap would be that important, but it is. When it's loose or cracked, fuel vapors leak out and can throw the whole fuel system off. This causes a reduction in gas mileage and increases emissions.
What causes it: If you get an error pointing to the gas cap it means fuel vapors are leaking out of your cap. This means the cap is either cracked or just wasn't tightened well enough.
What you should do: If your car isn't feeling jerky or strange when the check engine light comes on the first you should check is the gas cap. Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. Continue driving and see if the check engine light turns off. Alternately, you can purchase a gas cap for about $3 at an auto parts store. All you need to do is take the old one off and screw on the new one. If you've already made it to the store, you might as well just replace it. While not car-threatening, it's good to take care of this right away to improve gas mileage.

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My check engine light came on code P0446; dashboard says "check gas cap" i took it off retightened it and check engine light still on. I noticed that the metal flap for the gas nozzle is...


The metal flap should not trigger the sensor. Once you tighten the gas cap you should clear the code and see if it comes back. Otherwise it will take a while to go away.
If it does come back even though the gas cap is tight it could be the rubber seal around the gas cap replacing that can sometimes fix this issue also.

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It is good that you checked your gas cap, as that is a frequent cause of a check engine light, but there are also hundreds of other things too. A good idea is to go to your local auto parts store, and get your code downloaded for free, to see what tripped the light. Once you get that info, you can work towards the repair. I hope you get a cheap fix

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Try cleaning and retightening the gas cap. 9 time out of 10 a loose gas cap is causing the problem. The next likely problem is a bad oxygen sensor, but they are expensive.

Take your car to an AutoZone and have them hook it up to a diagnostic computer. They can detect the codes and diagnose the problem. It's FREE, and if you want to fix the problem they may have the parts as well.

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The gasket or large o-ring on the under side of the cap might be warn not keeping a tight seal. replace gasket or o-ring, or get a new cap, and see if that cures it.

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My suggestion is to get the fault codes stored in the car's ecu read by a VW approved garage. That will tell them what "was" wrong. Once a fault has occurred the check engine light will probably stay on until the warning has been cancelled using VW software.
As for the grade of gas used in the car, the users manual will tell you that - it might also be written inside the filler cap.

I wouldn't recommend further use of "engine cleaner" - it might do more harm than good.

Go get the codes read and then you'll know for sure.

Hope this helps. D

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