1999 Ford Ranger check engine light O2 sensor

Tiny
RICKYPETERS
  • MEMBER
  • 1999 FORD RANGER
  • 6 CYL
  • 4WD
  • MANUAL
  • 190,000 MILES
My check engine light is and and wont turn off. It says my O2 sensor is bad, so I changed it then it sadi the next one was bad and so fourth until I changed all three os sensors on my truck. I unplugged the battery over night to reset the computer and still the light is on. After reseting the computer, putting all new o2 sensors in the truck, the computer still say the o2 sensor is bad. Ive even changed out the new sensors with different new sensors just to make sure those weren't faulty. Is there some other part that is sending up that code that I could change?
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Thursday, October 22nd, 2009 AT 7:55 PM

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Tiny
BLUELIGHTNIN6
  • EXPERT
Hello and thanks for the donation!

A dirty or faulty catalytic converter will often throw the oxygen sensor fault code. Have the cat. Converter flow tested and ensure it is working properly.
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Thursday, October 22nd, 2009 AT 8:48 PM

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