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P1148 NISSAN



Possible causes
For Models 2005 and up:
- Faulty Air Fuel Ratio Sensor 1 Bank 1
- Air Fuel Ratio Sensor 1 Bank 1 circuit is open or shorted
- Air Fuel Ratio Sensor 1 Bank 1 circuit electrical connection

For Models before 2005:
- Faulty Heated Oxygen Sensor 1 Bank 1
- Heated Oxygen Sensor 1 Bank 1 circuit is open or shorted
- Heated Oxygen Sensor 1 Bank 1 circuit electrical connection

Tech notes
There is a service bulletin for the following models:

2005-2006 Nissan Altima
2005-2006 Nissan Altima Service Bulletin P1148 OBDII Code

2004 Nissan Maxima w/ 5 Speed Automatic Transmission
2004 Nissan Quest w/ 5 Speed Automatic Transmission
2004 Nissan Maxima, Quest Factory Service Bulletin P1148 OBDII Code

2004 Nissan Maxima w/ Manual Transmission or 4 Speed Automatic Transmission
2004 Nissan Quest w/ 4 Speed Automatic Transmission
2004 Nissan Maxima, Quest Factory Service Bulletin P1148 OBDII Code

2004 Nissan Armada
2004 Nissan Titan
2004 Nissan Armada/Titan Factory Service Bulletin P1148 OBDII Code

Help with this

When is the code detected?
The closed loop control function for bank 1 does not operate even when vehicle is driving in the specified condition, the closed loop control function for bank 2 does not operate even when vehicle is driving in the specified condition.
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1148 NISSAN Description

The Engine Control Module (ECM) performs ON/OFF duty control of the Air Fuel Ratio (A/F)/Heated Oxygen Sensor 1 heater corresponding to the engine operating condition to keep the temperature of Air Fuel Ratio (A/F)/Heated Oxygen Sensor 1 element at the specified range.

NISSAN Technical Service Bulletins for P1148 code
2003 NISSAN ALTIMA Electrical System
2004 NISSAN 350Z Electrical System
2004 NISSAN ALTIMA Electrical System
2004 NISSAN MURANO Electrical System
2004 NISSAN MAXIMA Electrical System
2004 NISSAN QUEST Electrical System
2004 NISSAN MAXIMA Electrical System
2004 NISSAN QUEST Electrical System
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