Hi Folks! Need help with P0130 and P0136

[rrthomas]

I have a 97 Infiniti I30 that has been increasingly hard to start, yet setting no codes. Today I got P0130 and P0136. Can someone, in common terms tell me what sensors to order, there seem to be more than one - and the terms used by parts houses are different still? I understand I have three? I have found listed upstream, right or left, downstream right or left, and so on. Bank 1 and 2, sensor 1 and 2? Everyone should use the same terms, my God! I usually order from Rock Auto.

[ezb57e]

While there may be problems with your O2 sensors and/or their circuits, they will not make the car hard to start. Until the engine has started and the sensors are heated up, their signal is ignored.
Sensor 1, on either bank is the "upstream" sensor, while Sensor(s) 2 are downstream of the catalytic convertors.
I think your root problem is elsewhere.