check engine

LEXUS
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PATCHY123
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  • 4 POSTS
I have a 1999 lexus es300 with 80,000 miles and a v6 3.0L engine. The check engine light came on and I took it to a mechanic to get a diagnostic and he said one or two or three of the sensors will need to be changed. He was saying oxygen sensors. Is this a big problem. Is is something that needs to be fixed immediatley? What are the effects if not fixed too soon. And also what can go wrong?
Mar 19, 2007 at 5:30 PM
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SERVICE WRITER
  • ✓Experienced Mechanic
  • 9,123 POSTS
For one it will affect your gas mileage as the computer will make incorrect decisions based on false data. If it is causing a rich condition for example, damage may start to occur to the converter.

Your best bet is to replace them.
Mar 19, 2007 at 10:15 PM
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LOSTINMARS
  • ✓Experienced Mechanic
  • 222 POSTS
what was the code(s)?
Apr 9, 2007 at 8:04 PM
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