Loose O2 Sensors
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Senior Member
Joined: Jun 2005
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Loose O2 Sensors
Would loose oxygen sensors cause PO171, PO174?
Both rear ones come loose regularly, and I retighten them regularly. I've checked and no pcv leaks, maf is clean, recent tune up, and fuel injectors cleaned.
Thanks.
Both rear ones come loose regularly, and I retighten them regularly. I've checked and no pcv leaks, maf is clean, recent tune up, and fuel injectors cleaned.
Thanks.
Senior Member
Joined: Jul 2004
Posts: 6,200
Likes: 39
From: Easton, Pa.
What do the codes tell you?
It's not the sensors that are the problem. They are only detecting it as the only way the system has to report the issue.
Description usually tells you 'lean'.
This means excess air passing through the motor for some reason, maybe like an air leak in the intake tract!
It can be from a lack of sufficient fuel but 99% of the time is not.
Good luck.
It's not the sensors that are the problem. They are only detecting it as the only way the system has to report the issue.
Description usually tells you 'lean'.
This means excess air passing through the motor for some reason, maybe like an air leak in the intake tract!
It can be from a lack of sufficient fuel but 99% of the time is not.
Good luck.
Last edited by Bluegrass; Apr 24, 2014 at 09:12 AM.
Technical Article Contributor
Joined: Dec 2008
Posts: 928
Likes: 9
You have to REGULARLY tighten the o2 sensors? I have never heard of such a thing. Do I need to get out more? Those sensors are usually seized in there. Are the exhaust bung threads damaged? Are the sensor threads damaged?
