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O2sensor

Tiny
MAVERICK
  • MEMBER
  • 2001 TOYOTA 4RUNNER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
Obd2 po171 lean bank 1 havn't taken maf apart yet, but was told o2 is bad. Low idle uses more gas smells like gas at idle hesatates when cold. What do you suggest? Thanks Mark Yocom also 140.000 miles on toy. But has excellent maintanence from prior owner.
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Monday, December 20th, 2010 AT 3:07 AM

4 Replies

Tiny
BOATBUDDY
  • MEMBER
  • 29 POSTS
Have you tested the o2 sensor? Also check maf like you said and e.C.T. Sensor, a/f sensor.
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Monday, December 20th, 2010 AT 3:31 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
A lean mixture is usually caused by a vacuum leak. Have you checked that? Also, with the scanner attached, the O2 sensor should move between.35 and.55 volts. If it is out of range, replace it.

Let me know what you find.
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Saturday, January 1st, 2011 AT 10:36 PM
Tiny
MAVERICK
  • MEMBER
  • 2 POSTS
Thanks to boatbuddy and jacob for your reply's. I have some medical problems right now, but as soon as I can I will check what you have suggested. I purchased a OBD11 can reader am dissapointed in what it does'nt tell you. Very missleading, I don't have alot of money to spend. Thanks again Mark
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Sunday, January 2nd, 2011 AT 2:37 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Mark:
When you are feeling better, let us know what you find. The scanner will help regardless. We'll help you figure it out.

Joe
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Sunday, January 2nd, 2011 AT 10:43 PM

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