Question about 1996 Nissan 240SX
Where is the upstream oxygen sensor on my 1997 Dodge Stratus 2.5L V6. I found the one that is downstream, but the upstream one, can't find. Getting trouble code 21 (using the ignition key technique) that says o2 sensor circuit voltage is not fluctuating.
Upstream, as in ahead of the converter, back toward engine. Start at converter and work your way back, should be on exhaust pipe or even on manifold.
Posted on Jan 11, 2009
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Posted on Jan 02, 2017
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