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The dreaded P1273 Code (2005 2.5S)
Info and Symptoms:
OEM exhaust, no mods
SES Light on (P1273 code)
Fuel smell noticable near outside read of the car
Braiding on exhaust flex pipe torn, but can't find a break in the flex pipe
No noticable breaks in the precat, cat piping, muffler, resonator,
Grounding wire near tailpipes is broken.
Fuel mileage: unknown (my other half drives the car and buys the gas)
Oil consumption: Unknown (I'll keep track from now on)
I've been reading through other threads, and it seems people will replace sensors only to have the P1273 code come back. The o2 and a/f sensors aren't cheap, so I'd like to narrow down which one it could be. Based on the fuel smell, which sensor might be bad?
I see two sensors on the exhaust: before the precat and before the flexpipe. Which sesnors are these, and where are the others?
I've read about the precat particles getting sucked into the engine, wearing the cylinder walls and rings, and oil consumption going up. I'd love to fix this before it becomes an issue, if it is an issue I'll sell the car. One thought was oil is being consumed, blown out the exhaust and has gunked up a sensor. Has a bad precat been linked to the P1273 code?
'05 Altima 2.5S, 129K.
Fixed: Rust holes in floor
Replaced: both CP sensors, Header without precat, alternator, blower motor resistor
Maintenance: Oil, trans fluid, brake pads & rotors, battery, serpentine belt.
I'm Never buying a Nissan ever again.