AutoCodes – GMC – P0147 GMC

P0147 GMC 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 GMC 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 964

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
FAQs
Comments
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Code P0147 GMC 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 GMC - HO2S Heater Circuit Bank 1 Sensor 3 - AutoCodes.com — P0147 GMC Code - HO2S Heater Circuit Bank 1 Sensor 3

What does this mean?

What are the Possible Causes of the DTC P0147 GMC?

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 GMC?

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 GMC 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.

Need more information about the P0147 GMC code?

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Need Help with the Code?

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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 P0147 GMC Code

1. What are the common symptoms of OBDII code P0147 GMC?

- Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine Light.

2. What does the OBDII code P0147 GMC indicate?

- This code indicates an issue with the HO2S (Heated Oxygen Sensor) heater circuit on Bank 1 Sensor 3.

3. What are the possible causes of OBDII code P0147 GMC?

- Possible causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or a malfunctioning engine control module (ECM).

4. How can I diagnose the issue related to OBDII code P0147 GMC?

- Diagnosing the issue involves checking the wiring and connectors for damage, testing the oxygen sensor's heater circuit, and verifying the ECM operation.

5. How can I repair OBDII code P0147 GMC?

- Repair options include replacing the faulty oxygen sensor, repairing damaged wiring or connectors, replacing a blown fuse, or reprogramming the ECM if necessary.

6. Can I drive my vehicle with OBDII code P0147 GMC?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent potential damage and ensure optimal performance.

7. Will OBDII code P0147 GMC cause my vehicle to fail an emissions test?

- Yes, this code can cause your vehicle to fail an emissions test due to the impact on the oxygen sensor's functionality and emissions control system.

8. How much does it cost to fix OBDII code P0147 GMC?

- The cost of fixing this code can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

9. How long does it take to repair OBDII code P0147 GMC?

- The repair time can vary based on the complexity of the issue and the availability of parts, but it typically takes around 1 to 2 hours to diagnose and fix the problem.

10. Can I reset OBDII code P0147 GMC without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is not recommended to do so without addressing the root cause, as the issue may persist and affect your vehicle's performance.