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1999 Ford Escort Oxygen sensor and light on

Tiny
CHRISYAM2010
  • MEMBER
  • 1999 FORD ESCORT
Electrical problem
1999 Ford Escort 4 cyl Two Wheel Drive Automatic 154k miles

my check engine light is on, when I connect the scanner it says that I have a mal function in sensor one bank one. I changed the o2 sensor before the cat converter two time already and the light hasnt turned off. What can it be?
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Friday, April 2nd, 2010 AT 11:28 PM

3 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
You have to delete the trouble codes with the scanner, it will not turn off on its own.
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Saturday, April 3rd, 2010 AT 12:08 AM
Tiny
CHRISYAM2010
  • MEMBER
  • 2 POSTS
[quote="chrisyam2010"]Electrical problem
1999 Ford Escort 4 cyl Two Wheel Drive Automatic 154k miles

well actually I have tried that and nothing works, it is something in the sensor! I have deleted the codes 3 times already and it keeps coming up. If I have changed the o2 sensor and that is not the problem then what it is? Can you help me with this?
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Saturday, April 3rd, 2010 AT 10:35 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
If you have deleted the code and it comes back then most likely the cat. Converter is faulty. A bad converter will cause the oxygen sensor fault code to appear.
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Sunday, April 4th, 2010 AT 3:36 PM

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