Quote:
Originally Posted by Robb235
If the upstream sensor hasn’t been replaced in a long time, or if you don’t know the last time it was replaced, I would just put a new one in as part of preventative maintenance. Denso p/n 234-4162 (or 234-4161 if manual transmission, different length wiring harness on the sensor).
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I'm going to give this a go when I get back to it, since it's past due anyway. I've been told that wouldn't cause it by more than one person but also the one thing I haven't tried. I'm not coming across any record of testing the O2 sensor and don't recall if I did either. Now, being able to get my fuel trims and doing some research I'm learning the O2 sensor could cause the exact issues I'm having but seems I should be getting codes for more cylinders. I didn't check my pending codes to see if maybe there were other cylinders pending.
Appreciate your input.
