AutoCodes – Nissan – P1168 2003 Nissan Altima Sedan

P1168 2003 Nissan Altima Sedan Code - Closed Loop Control Function Bank 2

Quick Answer

The Engine Control Module (ECM) performs ON/OFF duty control of the Heated Oxygen Sensor 1 heater corresponding to the engine operating condition to keep the temperature of Heated Oxygen Sensor 1 element at the specified range. Common causes include Faulty Heated Oxygen Sensor 1 Bank 2, Heated Oxygen Sensor 1 Bank 2 harness is open or shorted, Heated Oxygen Sensor 1 Bank 2 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: P1168 2003 Nissan Altima Sedan indicates Closed Loop Control Function Bank 2.
Common causes: Common causes include Faulty Heated Oxygen Sensor 1 Bank 2, Heated Oxygen Sensor 1 Bank 2 harness is open or shorted, Heated Oxygen Sensor 1 Bank 2 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 3,347

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 May 06, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1168 2003 Nissan Altima Sedan Description

OBDII Code P1168 2003 Nissan Altima Sedan - Closed Loop Control Function Bank 2 - AutoCodes.com — P1168 2003 Nissan Altima Sedan Code - Closed Loop Control Function Bank 2

What does this mean?

What are the Possible Causes of the DTC P1168 2003 Nissan Altima Sedan?

Faulty Heated Oxygen Sensor 1 Bank 2
Heated Oxygen Sensor 1 Bank 2 harness is open or shorted
Heated Oxygen Sensor 1 Bank 2 circuit poor electrical connection

How to Fix the DTC P1168 2003 Nissan Altima Sedan?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1168 2003 Nissan Altima Sedan 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 P1168 2003 Nissan Altima Sedan Code

1. What does the OBDII code P1168 indicate on a 2003 Nissan Altima Sedan?

- Code P1168 on a 2003 Nissan Altima Sedan indicates a problem with the Closed Loop Control Function on Bank 2, suggesting that the engine control module (ECM) cannot adequately control the fuel mixture when the engine is in closed loop mode.

2. What are the common symptoms of code P1168 in a 2003 Nissan Altima Sedan?

- Symptoms may include a check engine light, poor fuel economy, engine performance issues like hesitating or stalling, and possibly an unusual smell from the exhaust.

3. What are the typical causes of P1168 in a 2003 Nissan Altima Sedan?

- Common causes include faulty oxygen sensors, air or vacuum leaks, problems with the fuel system, or issues with the engine control module itself.

4. How can I diagnose the P1168 code in my 2003 Nissan Altima Sedan?

- Diagnosis involves checking the oxygen sensor readings with a scan tool, inspecting for leaks in the intake system, examining the condition and operation of the fuel injectors, and verifying the functionality of related electrical components like wiring and connectors.

5. What repair steps should be taken to resolve code P1168 on a 2003 Nissan Altima Sedan?

- Repairs might include replacing faulty oxygen sensors, repairing any leaks in the intake system or vacuum lines, cleaning or replacing dirty or malfunctioning fuel injectors, and repairing or replacing damaged wiring or connectors.

6. How urgent is it to address the P1168 code in a 2003 Nissan Altima Sedan?

- It is moderately urgent to address this issue, as running with an improper fuel mixture can lead to increased emissions, reduced fuel efficiency, and potentially more severe engine problems over time.

7. Can driving with code P1168 cause further damage to my 2003 Nissan Altima Sedan?

- Yes, continuing to drive with this issue can lead to increased wear on engine components due to running with an improper air-fuel mixture, potentially leading to more expensive repairs.

8. Is it possible for code P1168 to clear itself on a 2003 Nissan Altima Sedan?

- While it's possible for the check engine light to turn off if the condition causing the code is intermittent, the underlying problem usually requires attention to ensure it is properly resolved.