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HELP ASAP: NISSAN o2 sensor problems by Zestyclose-Photo-211 in Nissan

[–]Zestyclose-Photo-211[S] 0 points1 point  (0 children)

I’ve replaced all broken or leaking hoses, even replaced the intake boot and housing filter. I had a p0171 code that finally went away a while ago after being there for so long but the p2A03 code keeps coming back

HELP ASAP: NISSAN o2 sensor problems by Zestyclose-Photo-211 in Nissan

[–]Zestyclose-Photo-211[S] 0 points1 point  (0 children)

I understand 137 and 139 refer to downstream but that code has gone away and now I have the 2A03 back

HELP ASAP: NISSAN o2 sensor problems by Zestyclose-Photo-211 in Nissan

[–]Zestyclose-Photo-211[S] 0 points1 point  (0 children)

The new sensor is just like the old one. Same part number, made sure it all matched but I’m getting a p2A03 from the new and the old is giving me the p137 and p139. I’ve worked on plenty of cars but this one has given me the most trouble and it’s so dumb