AutoCodes - Nissan - P1144 2003 NISSAN ALTIMA SEDAN

P1144 2003 NISSAN ALTIMA SEDAN Code - Heated Oxygen Sensor 1 Rich Shift Monitoring

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3
Table of contents

|P1144 2003 NISSAN ALTIMA SEDAN code possible causes

  • Faulty Front Heated Oxygen Sensor Bank 1
  • Front Heated Oxygen Sensor Bank 1 harness is open or shorted
  • Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks

|How do I fix the P1144 2003 NISSAN ALTIMA SEDAN code?

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.

|P1144 2003 NISSAN ALTIMA SEDAN code tech notes

Replacing the O2 Sensor 1 Bank 1 usually takes care of the problem.

|Cost of diagnosing the P1144 2003 NISSAN ALTIMA SEDAN code

Labor: 1.0

The cost of diagnosing the P1144 2003 NISSAN ALTIMA SEDAN code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P1144 2003 NISSAN ALTIMA SEDAN code detected?

An excessively high voltage from the sensor is sent to Engine Control Module (ECM).

|What are P1144 2003 NISSAN ALTIMA SEDAN code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • High Fuel Consumption
  • Excessive Smoke from Exhaust

|P1144 2003 NISSAN ALTIMA SEDAN code description

The Front Heated Oxygen Sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.
OBDII Code P1144 2003 Nissan Altima Sedan - Heated Oxygen Sensor 1 Rich Shift Monitoring - AutoCodes.com

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|P1144 2003 NISSAN ALTIMA SEDAN code comments

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