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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 05-03-2008
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o2 sensor question

I just took my Ranger 4.0L to get the oil changed. As I was leaving the dealership the check engine light came on. The codes said Bank 1 and Bank 2 -- system too lean.

Can anyone help me on this issue, have all the o2 sensors went bad, or is something else going on?
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Old 05-03-2008
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Check out this first before you buy anything like 02 sensor's

Vaccum leak.
https://www.ranger-forums.com/forum2...ad.php?t=63031
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Old 05-03-2008
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Thanks! I'll check that out.
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Old 05-25-2008
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Sorry I haven't posted anything back lately. I changed the hose that was mentioned and that took care of all my problems.

Once again, thanks!
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Old 05-25-2008
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Happy i could help and it was a easy fix!
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