P1283 IPR failure - whats this about?

[wildpig]

I just got this code on my recently acquired stock 04 G35 w 85k mile. Guess i'll reset Ecu and see what happen. Any bad thinq about this code?

[ProudNissanFreak]

P1283 is an A/F ratio fault, "Air fuel ratio (A/F) sensor 1 (Bank 2) lean shift monitoring" to be precise. It could be any number of things...

(A/F) sensor 1 - (A/F) sensor 1 heater - Fuel pressure - Fuel injector - Intake air leaks

Is the car running ok? Does it hesitate, stumble or idle roughly? What's your MPG look like? I suppose the previous owner could have knocked the sensor out of place or damaged it, but sensor 1 is near the exhaust manifold...are there aftermarket headers installed? I can't imagine dinging it doing a short ram and test pipes.

You need to sort it out though, if the sensor is bad that's one thing, but if it's right and and you're running lean you're risking lean misfiring/detonation.

[wildpig]

i did put in some regular gas on my way driving bk picking Up car. Would that does it? guess i'll see what happen changing bk to supreme gas soon.

[biggie]

Very possible. Engine is designed to run 91 or higher.