2005 Altima 1148 code - Altima Nissan Cars & Trucks

Here is a thread at a Nissan forum that covers this as it happens often.

2005 Altima P0335 and P0725 errors Nissanhelp com Forums

You were right in thinking if you replaced the sensor all would be fixed. But code 1148 means the sensor is not going into closed loop mode, and code 1031 means the heater in the sensor is not working.
Code 1031 could cause code 1148, and the actual problem could be in the wiring harness or the power source for the heater inside the O2 sensor.

Code 1148 and 1031 are both for the O2 sensor in front of the catalytic converter. The sensor would need to be tested with a scanner and a multi-meter.
Source: WHAT is p1148 code and P1031 code for Nissan sentra 2005?

P0420 Catalyst System Efficiency Below Threshold seek help could be expensive.

Wow, looks like I have answered a question like this back on July 26th.
Code 1148 and 1031 are both for the O2 sensor in front of the catalytic converter. The sensor would need to be tested with a scanner and a multi-meter.

Well looks like all 4 codes point to the O2 sensor bank one sensor one.
Code 1148 and 1279 are for problems with the performance of the sensor, code 1031 is for a problem with the heater in the sensor, and code 420 is for poor performance of the catalytic converter on bank one which could also be the sensor.
I would probably replace the sensor or switch it with the one on bank two and see if the codes change.

basically that is a communication code between one or more computers

you need a dealer scan tool or something similar like the $8000 snap-on scanner to verify which computers are suspect and a DVOM to measure voltage on the communication circuits between the suspect computers

long story short.... this is a job for a select few technicians.... your best bet, depending on where you live.... is the dealer

No those codes would not support a bad starter diagnosis.

And those are not correct codes for a 2005....codes should be a 4 digit code

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

A p0420 code indicates a Catalytic System efficiency failure, Bank 1.
Basically, the computer is seeing reduced efficiency of the catalytic converter or one of it's components (such as an 02 sensor)

There may be a few root causes, such as a faulty oxygen sensor, faulty coolant temperature sensor, faulty converter, Large exhaust leak, or retarded (slow) timing.