AutoCodes – Infiniti – P1144 2003 Infiniti G35

P1144 2003 Infiniti G35 Code - Heated Oxygen Sensor 1 Rich Shift Monitoring

Quick Answer

The Front Heated Oxygen Sensor (or O2 sensor 1) is placed into the exhaust manifold. Common causes include 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. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1144 2003 Infiniti G35 indicates Heated Oxygen Sensor 1 Rich Shift Monitoring.
Common causes: Common causes include 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.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 3,095

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 01, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1144 2003 Infiniti G35 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 Infiniti G35 - Heated Oxygen Sensor 1 Rich Shift Monitoring - AutoCodes.com — P1144 2003 Infiniti G35 Code - Heated Oxygen Sensor 1 Rich Shift Monitoring

What does this mean?

What are the Possible Causes of the DTC P1144 2003 Infiniti G35?

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 to Fix the DTC P1144 2003 Infiniti G35?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1144 2003 Infiniti G35 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1144 2003 Infiniti G35 Code

1. What are common symptoms of OBDII code P1144 on a 2003 Infiniti G35?

The common symptoms of code P1144 in a 2003 Infiniti G35 include a decrease in fuel efficiency, rough idling, and potential engine stalling.

2. What does OBDII code P1144 on a 2003 Infiniti G35 indicate?

Code P1144 on a 2003 Infiniti G35 indicates an issue with the Heated Oxygen Sensor 1 Rich Shift Monitoring system.

3. What are the possible causes of OBDII code P1144 on a 2003 Infiniti G35?

Possible causes of code P1144 on a 2003 Infiniti G35 include a faulty Heated Oxygen Sensor (HO2S), a vacuum leak, a malfunctioning fuel injector, or issues with the engine's air intake system.

4. How can I diagnose the cause of OBDII code P1144 on my 2003 Infiniti G35?

To diagnose the cause of code P1144 on a 2003 Infiniti G35, you can use an OBDII scanner to read the code and then inspect the Heated Oxygen Sensor, check for vacuum leaks, test the fuel injectors, and examine the air intake system for any issues.

5. Can I still drive my 2003 Infiniti G35 with OBDII code P1144?

It is not recommended to drive your 2003 Infiniti G35 with OBDII code P1144, as it can lead to further damage to the engine and emissions system. It is best to address the issue promptly.

6. How do I repair OBDII code P1144 on my 2003 Infiniti G35?

Repairing code P1144 on a 2003 Infiniti G35 involves replacing the faulty Heated Oxygen Sensor, fixing any vacuum leaks, addressing fuel injector problems, or repairing issues with the air intake system.

7. Is it possible to reset OBDII code P1144 on a 2003 Infiniti G35?

While you can reset the code using an OBDII scanner, it is important to address the underlying issue causing code P1144 on your 2003 Infiniti G35 to prevent it from reoccurring.

8. How much does it cost to fix OBDII code P1144 on a 2003 Infiniti G35?

The cost to fix code P1144 on a 2003 Infiniti G35 can vary depending on the cause of the issue. Costs may include the price of a new Heated Oxygen Sensor, labor costs, and any additional repairs needed.

9. Can a DIY enthusiast repair OBDII code P1144 on a 2003 Infiniti G35?

While some DIY enthusiasts may have the skills to address code P1144 on a 2003 Infiniti G35, it is recommended to have the repair done by a professional mechanic to ensure proper diagnosis and resolution of the issue.

10. How often does OBDII code P1144 occur in a 2003 Infiniti G35?

OBDII code P1144 can occur sporadically in a 2003 Infiniti G35, depending on the condition of the vehicle and maintenance history. Regular inspections and maintenance can help prevent this code from appearing.