P1148 NISSAN Possible Causes
For 2005 and later models:
- Faulty Air/Fuel Ratio Sensor 1, Bank 1
- Air/Fuel Ratio Sensor 1, Bank 1 circuit open or shorted
- Electrical connection in Air/Fuel Ratio Sensor 1, Bank 1 circuit
For pre-2005 models: - Faulty Heated Oxygen Sensor 1, Bank 1
- Heated Oxygen Sensor 1, Bank 1 circuit open or shorted
- Electrical connection in Heated Oxygen Sensor 1, Bank 1 circuit
How to Fix Code P1148 NISSAN?
Start by checking the “Possible Causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
- Check Engine Light on (or Service Engine Soon Warning Light)
P1148 NISSAN Meaning
The Engine Control Module (ECM) performs an on/off control of the Air/Fuel Ratio (A/F) Heated Oxygen Sensor 1 corresponding to the engine operating condition to maintain the Air/Fuel Ratio (A/F) Heated Oxygen Sensor 1 element temperature within the specified range. The Diagnostic Trouble Code (DTC) is set when the closed-loop control function for Bank 1 does not operate even when the vehicle is driven under specified conditions, or the closed-loop control function for Bank 2 does not operate even when the vehicle is driven under specified conditions.