05 altima randomly dying

Asked by 63cagedfalcon Dec 29, 2020 at 10:14 PM about the 2005 Nissan Altima 2.5 SL

Question type: Maintenance & Repair

Hello, first post & wifes car has an issue, now
I have an issue.

05 Altima 2.5, 175k, norally a great car.

Random dying any where from 10 minutes to
several days of running. Try to restart and
seems like the battery is dead
but let it sit a while(and that time will also
vary) it will start & drive normal.

Replaced, upstream O2 sensor, cam & crank
sensors, plugs & coils. Reprogrammed
throttle after sensors.
Cleaned MAF with proper cleaner. Fuel pump
was also replaced about 2 months before this
all started to happen.

I would say vacuum leak maybe for dying but
not the no start due the battery acting dead.

Only code was & is P0420, clogged cat?
Thermal temp is 410F which is low end of
normal op temp.
Would a bad downstream be causing this
issue?

Thanks Paul

4 Answers

F_O_R answered 3 years ago

410 degrees is way below normal operating temperature. It sounds like the cat is not lighting off which could be caused by the cat being completely fouled. I suppose you could try a converter cleaning additive.

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