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New OBD2 code p0140 850 1997

posted by  Shaughnessy on  Tue Aug 11 21:11 CST 2020
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last visit: Fri Oct 3 23:53 CST 2014
[RELATED]

so earlier I mentioned I had a 0410 code (couldn't pass DEQ, ended up plugging in a vacuum hose and passed deq).

Today I was driving to work and my CEL came on. I returned home (I was close to home) and swapped cars.

I checked the codes and p0140 came up. That seems to indicate rear o2 sensor.

I haven't had a chance to look under the car for other potential issues (the area I work on my cars is not currently accessible).

Are there other things that would cause a p0140 code to throw?

Also, should I replace BOTH o2 sensors at the same time?
--
1985 245. 246K Gone..but not forgotten. Sold in 2013, found 2018! Still running on the road. Of course. 1993 Volvo 850 soon to be gone






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