Mikevan10 Posted May 21, 2017 Share Posted May 21, 2017 P0136 = O2S circuit malfunction 1997 Legacy GT, 2.2 l, manual trans. What is the cure for this? The 3 pin connector seems to have good connectivity? Thanks! Mike V Quote Link to comment Share on other sites More sharing options...
06SubLegTx Posted May 22, 2017 Share Posted May 22, 2017 (edited) P0136 = O2S circuit malfunction 1997 Legacy GT, 2.2 l, manual trans. What is the cure for this? The 3 pin connector seems to have good connectivity? Thanks! Mike V Read this:http://www.ultimatesubaru.org/forum/topic/115594-p0136-oxygen-o2-sensor-circuit-low-voltage-bank-1-sensor-2/ also: https://www.yourmechanic.com/article/p0136-obd-ii-trouble-code-o2-sensor-circuit-malfunction-bank-1-sensor-2-by-jay-safford Edited May 22, 2017 by 06SubLegTx Quote Link to comment Share on other sites More sharing options...
punx2400 Posted May 22, 2017 Share Posted May 22, 2017 I had this problem just last month. I just disconnected the rear (for me) o2 plug, scraped all the corrosion out of the female end, sprayed the hell out of it with electric contact cleaner and compressed air and hooked it back up. No MIL since. I guess the rubber boot inside the female end gets worn and lets moisture from rain/puddles in there and causes problems. Quote Link to comment Share on other sites More sharing options...
punx2400 Posted May 22, 2017 Share Posted May 22, 2017 I also went a bit overkill and duct taped the plug real good to make sure I'd never have to deal with water getting in there again... ???? Quote Link to comment Share on other sites More sharing options...
Mikevan10 Posted July 15, 2017 Author Share Posted July 15, 2017 I have a leak at the flange AFTER the cat. That would not cause a P0136 would it? I don't see how the system would "know" there is an issue downstream of the rear O2 sensor. Quote Link to comment Share on other sites More sharing options...
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