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2001 Ford Ranger OXYGEN SENSOR

Tiny
HILLHEAD
  • MEMBER
  • 2001 FORD RANGER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 112,000 MILES
MY SCANNER ALLOWS ME TO SEE THE DATA STREAM. THE TWO SENSORS UPSTREAM SHOW RICH/LEAN SWITCHES AND VOLTAGE CHANGES. THE DOWN STREAM SENSOR (AFTER THE CAT) SHOWS "NO DATA" BUT THERE ARE NO CODES SET. ENGINE IDLES ROUGH, IT RUNS FINE UP TO 50 MPH THEN MISFIRES BAD AGAIN. NEW- MAS-TPS-COIL-PLUGS-FUEL FILTER- ANYONE GOT ANY IDEAS. THANKS.
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Tuesday, February 23rd, 2010 AT 12:25 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,644 POSTS
Have you checked the downstream sensors?
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Monday, March 1st, 2010 AT 10:54 PM
Tiny
HILLHEAD
  • MEMBER
  • 8 POSTS
I THINK THE ONLY OXYGEN SENSOR DOWNSTREAM IS THE ONE THAT SHOWS "NO DATA" BUT SETS NO CODES. THE TRUCK RUNS LIKE CRAP---
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Tuesday, March 2nd, 2010 AT 5:30 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,644 POSTS
I would check it to see if that is where the problem is. It may not be setting the light for some reason.
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Wednesday, March 3rd, 2010 AT 6:40 AM
Tiny
HILLHEAD
  • MEMBER
  • 8 POSTS
THANKS.I WILL REPLACE THE SENSOR. HOPE IT SOLVES THE PROBLEM.
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Wednesday, March 3rd, 2010 AT 8:57 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,644 POSTS
You can check the resistance in the old one to see if it is bad, or maybe one or the parts stores will do it for you.

Let me know if you have questions.
Joe
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Wednesday, March 3rd, 2010 AT 10:05 AM
Tiny
HILLHEAD
  • MEMBER
  • 8 POSTS
I REPLACEDTHE DOWNSTREAM OXYGEN SENSOR AND IT MADE NO DIFFERENCE. IT STILL SHOWS "NO DATA" ON MY SCANNER. ALSO IF YOU UNPLUG THE IAC OR THE MAS IT DOES NOT CHANGE THE WAY THE ENGINE IDLES, WHICH IS CRAPPY. NO CODES SET.
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Wednesday, March 3rd, 2010 AT 3:37 PM

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