AutoCodes – Infiniti – P015C Infiniti

P015C Infiniti Code - Air Fuel Ratio Delayed Response - Rich To Lean Bank 2 Sensor 1

Quick Answer

The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sensor. Common causes include Faulty Air Fuel Ratio (A/F) Bank 2 Sensor 1, Air Fuel Ratio (A/F) Bank 2 Sensor 1 harness is open or shorted, Air Fuel Ratio (A/F) Bank 2 Sensor 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: P015C Infiniti indicates Air Fuel Ratio Delayed Response - Rich To Lean Bank 2 Sensor 1.
Common causes: Common causes include Faulty Air Fuel Ratio (A/F) Bank 2 Sensor 1, Air Fuel Ratio (A/F) Bank 2 Sensor 1 harness is open or shorted, Air Fuel Ratio (A/F) Bank 2 Sensor 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 2,450

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 12, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code P015C Infiniti Description

The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sensor. The sensor element of the A/F sensor 1 is composed an electrode layer, which transports ions. It has a heater in the element. The sensor is capable of precise measurement λ = 1, but also in the lean and rich range. Together with its control electronics, the sensor outputs a clear, continuous signal throughout a wide λ range. The exhaust gas components diffuse through the diffusion layer at the sensor cell. An electrode layer is applied voltage, and this current relative oxygen density in lean. Also this current relative hydrocarbon density in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this electrode layer of current. In addition, a heater is integrated in the sensor to ensure the required operating temperature of approximately 760°C (1,400°F).

OBDII Code P015C Infiniti - Air Fuel Ratio Delayed Response - Rich To Lean Bank 2 Sensor 1 - AutoCodes.com — P015C Infiniti Code - Air Fuel Ratio Delayed Response - Rich To Lean Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P015C Infiniti?

Faulty Air Fuel Ratio (A/F) Bank 2 Sensor 1
Air Fuel Ratio (A/F) Bank 2 Sensor 1 harness is open or shorted
Air Fuel Ratio (A/F) Bank 2 Sensor 1 circuit poor electrical connection

How to Fix the DTC P015C Infiniti?

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 Air Fuel Ratio Bank 2 Sensor 1 usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P015C Infiniti 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.