2003 Ford Focus 02 sensor on lean

2003 FORD FOCUS
75,000 MILES • 2.3L • 4 CYL • 2WD • AUTOMATIC
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RANDY SHARP
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  • 165 POSTS
I have posted this problem before it has had this trouble code for a couple of years it does not effect it unless you turn on the ac or the defrosters then it cuts out,but I take that back sometimes it does cut out even though you do not have the ac or defrosters on,it don't stall it just cuts out.But now I am ready to fix it I put new plugs in it a while back and I am going to check fuel pressure.Does anyone know of any other things I could check.
Feb 7, 2015 at 10:34 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
The most common cause of a lean condition is a engine vacuum leak. Check for that first and let me know what you find. Also, if you have the trouble code, that may help me. And yes, low fuel pressure could cause it too.
Feb 7, 2015 at 12:06 PM
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RANDY SHARP
  • MEMBER
  • 165 POSTS
The trouble code is 2274 02 Sensor Signal Stuck Lean-Bank 1 Sensor 3
Feb 8, 2015 at 11:28 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Have you replaced the sensor?
Feb 11, 2015 at 8:38 AM
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