AutoCodes – Buick – P0147 Buick

P0147 Buick Code - HO2S Heater Circuit Bank 1 Sensor 3

Quick Answer

When the ignition is turned on, the battery voltage is supplied to HO2S 3 heater to provide for faster sensor warm-up, thus allowing the sensor to become active in a shorter period of time. Common causes include Faulty HO2S Heater Circuit Bank 1 Sensor 3, HO2S Heater Circuit Bank 1 Sensor 3 harness is open or shorted, HO2S Heater Circuit Bank 1 Sensor 3 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: P0147 Buick indicates HO2S Heater Circuit Bank 1 Sensor 3.
Common causes: Common causes include Faulty HO2S Heater Circuit Bank 1 Sensor 3, HO2S Heater Circuit Bank 1 Sensor 3 harness is open or shorted, HO2S Heater Circuit Bank 1 Sensor 3 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 600

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jan 15, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0147 Buick Description

When the ignition is turned on, the battery voltage is supplied to HO2S 3 heater to provide for faster sensor warm-up, thus allowing the sensor to become active in a shorter period of time. Powertrain Control Module (PCM) reads the amount of time necessary for the sensor to become active after start-up. If PCM determines too much time was required for HO2S 3 to become active, the Diagnostic Trouble Code (DTC) P0147 will set.

OBDII Code P0147 Buick - HO2S Heater Circuit Bank 1 Sensor 3 - AutoCodes.com — P0147 Buick Code - HO2S Heater Circuit Bank 1 Sensor 3

What does this mean?

What are the Possible Causes of the DTC P0147 Buick?

Faulty HO2S Heater Circuit Bank 1 Sensor 3
HO2S Heater Circuit Bank 1 Sensor 3 harness is open or shorted
HO2S Heater Circuit Bank 1 Sensor 3 circuit poor electrical connection

How to Fix the DTC P0147 Buick?

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 P0147 Buick 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.