2003 Ford Focus oxygen sensor stuck too lean

Tiny
RANDY SHARP
  • 2003 FORD FOCUS
  • 65,000 MILES

I have a P0302 DTC and I have a P2274 oxygen sensor stuck too lean. How do I go about testing the oxygen sensor, and what would cause this sensor too be stuck too lean.I have posted this problem before but I am just getting around too trying to take care of problem, and like I said before it does not misfire all the time but when I turn on ac and put a load on it it will misfire all the time turn it off and it might not misfire right away it will run for awhile without misfiring, then sometimes it will start then it will go away, but it always misfires when ac is on. Why is the oxygen sensor stuck too lean unburned fuel and is it stuck lean because of misfire, it will only misfire at idle does not stall or die just at idle

Do you
have the same problem?
Yes
No
Monday, August 19th, 2013 AT 10:21 AM

1 Reply

Tiny
HMAC300
  • EXPERT
  • 45,767 POSTS

Check your fuel pressure with a gauge it may be to low causing both problems then check for a vacuum leak at that cylinder

Was this
answer
helpful?
Yes
No
Monday, August 19th, 2013 AT 12:10 PM

Please login or register to post a reply.

Other Oxygen Sensor O2 Test Questions