I have a 2004 350z with 67,000 miles on it. Never had a single problem with CEL/SES lights. Mods are CAI, MD 5/16 Spacer, Headers, Test Pipes, and True Dual Exhaust. The True Dual was the most recent part installed and I'm thinking thats why this code appeared.. It must've leaned it out a lot more than it already was.

**Test pipes have been on since February and never gave me a CEL/SES

Heres what the sheet AutoZone gave me says.

Code P1273
OEM Brand: Nissan/Datsun

Definition:
- Sensor lean shift detected
probable cause
- failed AF sensor
- vacuum leak in engine
- fuel injector or pressure regulator fault

what do i need to do to get this off? tune? remove exhaust? ecu reset? etc...

will this harm me in anyway?

i am looking to get a tune but not for another 6 or 7 months.

thanks in advance!

 

Anyone?

 

last bump then i give up

 

Bump I've doing research ! Did a tune still hAve the code did u fix it?

 

Bump

 

Its either an exhaust leak, or a failing O2 sensor, or you need a tune.