AutoCodes – Infiniti – P00D4 Infiniti

P00D4 Infiniti Code - Heated Oxygen Sensor Heater Sensor 2 Bank 2

Quick Answer

The Heated Oxygen Sensor (HO2S) Heater Sensor 2, after the Three-Way Catalyst (Manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Heated Oxygen Sensor Heater Sensor 2 Bank 2, Heated Oxygen Sensor Heater Sensor 2 Bank 2 harness is open or shorted, Heated Oxygen Sensor Heater Sensor 2 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: P00D4 Infiniti indicates Heated Oxygen Sensor Heater Sensor 2 Bank 2.
Common causes: Common causes include Faulty Heated Oxygen Sensor Heater Sensor 2 Bank 2, Heated Oxygen Sensor Heater Sensor 2 Bank 2 harness is open or shorted, Heated Oxygen Sensor Heater Sensor 2 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 271

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 Sep 21, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code P00D4 Infiniti Description

The Heated Oxygen Sensor (HO2S) Heater Sensor 2, after the Three-Way Catalyst (Manifold), monitors the oxygen level in the exhaust gas on each bank. Even if switching characteristics of the Air Fuel Ratio (A/F) Sensor 1 are shifted, the air-fuel ratio is controlled to stoichiometric, by the signal from the Heated Oxygen Sensor 2. This sensor is made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. Under normal conditions, the heated oxygen sensor 2 is not used for engine control operation. The Diagnostic Trouble Code (DTC) will be set when the Engine Control Module (ECM) detects a deterioration in the Heated Oxygen Sensor Heater Sensor 2 Bank 2 performance.

OBDII Code P00D4 Infiniti - Heated Oxygen Sensor Heater Sensor 2 Bank 2 - AutoCodes.com — P00D4 Infiniti Code - Heated Oxygen Sensor Heater Sensor 2 Bank 2

What does this mean?

What are the Possible Causes of the DTC P00D4 Infiniti?

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

How to Fix the DTC P00D4 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P00D4 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.