Replacing oxygen sensors

Tiny
FRED KING
  • MEMBER
  • 1999 TOYOTA CAMRY
Engine Performance problemy 4 cyl Front Wheel Drive 90000 miles

How do I replace the downstream oxygen sensor?
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Monday, July 13th, 2009 AT 8:37 PM

10 Replies

Tiny
STEVEW84
  • MEMBER
Hello,

You may need to raise the car up first safely. Here is guide that will help you with that.

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

Here is a guide to show you what you are in for when doing the job.

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Here are diagrams to show you the locations on your car so you can get the job done.

Check out the diagrams (Below)

Please let us know if you need anything else to get the problem fixed.

Cheers
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Thursday, July 16th, 2009 AT 7:54 AM
Tiny
FRED KING
  • MEMBER
Thanks! This did the trick I was wondering about the connector? They seem a little different than the old ones?
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Thursday, July 16th, 2009 AT 7:56 PM
Tiny
STEVEW84
  • MEMBER
Pull the wiring from the body and disconnect. You might have to pull the seat and pull the carpet up to disconnect it. The connectors must be the same or you have the wrong sensor or the sensor in the wrong spot.
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Thursday, July 16th, 2009 AT 8:09 PM
Tiny
FRED KING
  • MEMBER
Thanks again I love this site BTW.
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Thursday, July 16th, 2009 AT 8:47 PM
Tiny
STEVEW84
  • MEMBER
Nice work, we are here to help, please use 2CarPros anytime.
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Thursday, July 16th, 2009 AT 8:59 PM
Tiny
COSMICCG58
  • MEMBER
  • 1999 TOYOTA CAMRY
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 17,700 MILES
Engine problem
1999 Toyota Camry 4 cyl Front Wheel Drive Automatic 177, 00 miles

The vehicle started running rough, it was suggest that we spray cleaner into the throttle to clear up gunk build up. Ran better for a day, then started running rough again so we had a diagnostic done that showed it was missing on 2 cylinders. We changed the spark plugs, 4th one showed oil and carbon. It was suggested that when we put the clearner in the throttle it caused gunk to get on the plugs. Then the check engine light came on. Changed spark plug wires and runs like it use to before, but the check engine light stays on and our gas mileage has dropped considerably. Is this an oxygen sensor issue? If so, how do we tell which sensor has gone bad? If not, what else might be going on?
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Wednesday, January 17th, 2018 AT 10:58 AM (Merged)
Tiny
RASMATAZ
  • MEMBER
1st thing to do is get it scanned for code/s and comeback with the no.S then we'll go from there.
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Wednesday, January 17th, 2018 AT 10:58 AM (Merged)
Tiny
LOSTINMARS
  • MEMBER
Cleaner in the throttle caused gunk on the plugs?

Where exactly did you spray the cleaner?
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Wednesday, January 17th, 2018 AT 10:58 AM (Merged)
Tiny
ONTHEDOLE
  • MEMBER
  • 1999 TOYOTA CAMRY
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
Engine Mechanical problem
1999 Toyota Camry 4 cyl Two Wheel Drive Automatic 110000 miles

My mechanic says the computer is telling him I have bad O2 sensors, and replacement is around $550.

I'm a reasonably mechanically inclined guy-- I can replace an alternator, change plugs, replace heat blowers, change oil etc etc. I don't call myself a competent mechanic by any means.

Could this be a DIY project with a low chance of really screwing things up?
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Wednesday, January 17th, 2018 AT 10:58 AM (Merged)
Tiny
BLACKOP555
  • EXPERT
Very easy job. Just find out what o2 sensor it is. Go under the vehicle and loosen up the old one. They kinda VERY easy to get to.
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Wednesday, January 17th, 2018 AT 10:58 AM (Merged)

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