Any chance it won't go off?

2001 HYUNDAI ELANTRA
197,000 MILES
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RIEBED
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  • 111 POSTS
Hi

I replaced both O2 sensors with original hyundai sensor(after cat and before cat) in Jan. 2012-I just cleaned carbon from engine with seafoam. The CEL is now on, my question is will cleaner(seafoam) throw my readings off that greatly as to set off the CEL? and will it go off when the readings stabilize?
Jul 10, 2012 at 7:45 PM
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RASMATAZ
  • ✓Experienced Mechanic
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Scan the computer for code/s and comeback with the code/not the description of the problem-we start here -Go check out Autozone its free to the public-
Jul 10, 2012 at 7:57 PM
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RIEBED
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Codes are PO136/PO140 and PO141-possible got a bad O2 sensor-just changed both in Jan. 2012- Hyundai dealer I would hope they checked the circut before they replaced the sensor!
Jul 12, 2012 at 3:51 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Oxygen sensor problem:If the codes are still coming back-They should check the wiring and the computer
Jul 14, 2012 at 3:28 PM
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