Closed Loop Control Function Bank 1


Table of contents

P1148 NISSAN Possible Causes

  • 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

How do I fix code P1148 NISSAN?

  Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.

Tech Notes

  User Submitted Video

Cost of diagnosing the P1148 NISSAN code

  The cost of diagnosing the P1148 NISSAN code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible 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. The Diagnostic Trouble Code (DTC) will set when the closed-loop control function for bank 1 does not operate even when the vehicle is driving in the specified condition, the closed-loop control function for bank 2 does not operate even when the vehicle is driving in the specified condition.

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