May 21, 20178 yr 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
May 22, 20178 yr 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, 20178 yr by 06SubLegTx
May 22, 20178 yr 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.
May 22, 20178 yr 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... ????
July 15, 20178 yr Author 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.
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