AutoCodes – GMC – P015D 2016 GMC Sierra

P015D 2016 GMC Sierra Code - Oxygen Sensor Delayed Response Lean to Rich Bank 2 Sensor 1

Quick Answer

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open or shorted, Heated Oxygen Sensor 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: P015D 2016 GMC Sierra indicates Oxygen Sensor Delayed Response Lean to Rich Bank 2 Sensor 1.
Common causes: Common causes include Faulty Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open or shorted, Heated Oxygen Sensor 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 303

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 May 29, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P015D 2016 GMC Sierra Description

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the Engine Control Module (ECM) operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0 - 1, 000 mV. Once sufficient HO2S voltage fluctuation is observed by the ECM, Closed Loop is entered. The ECM uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases toward 1, 000 mV indicates a rich fuel mixture. An HO2S voltage that decreases toward 0 mV indicates a lean fuel mixture.
The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the ECM to calculate the air-to-fuel ratio sooner.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the HO2S 1 rich-to-lean or lean-to-rich average response time is greater than a calibrated value for greater than 60s.

OBDII Code P015D 2016 GMC Sierra - Oxygen Sensor Delayed Response Lean to Rich Bank 2 Sensor 1 - AutoCodes.com — P015D 2016 GMC Sierra Code - Oxygen Sensor Delayed Response Lean to Rich Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P015D 2016 GMC Sierra?

Faulty Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
Heated Oxygen Sensor Bank 2 Sensor 1 harness is open or shorted
Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection
Low or high fuel system pressure
Fuel contamination
Faulty fuel injectors
Exhaust gas leaks
Engine vacuum leaks

How to Fix the DTC P015D 2016 GMC Sierra?

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 Front Heated Oxygen Sensors (HO2S) usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P015D 2016 GMC Sierra 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 P015D 2016 GMC Sierra code?

Need more information on how to fix the P015D 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P015D 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P015D 2016 GMC Sierra Code

1. What does the OBDII code P015D mean on a 2016 GMC Sierra?

The P015D code indicates "Oxygen Sensor Delayed Response Lean to Rich Bank 2 Sensor 1," meaning the oxygen sensor on Bank 2 (upstream) is slow to switch between lean and rich conditions.

2. What are the symptoms of code P015D on a 2016 GMC Sierra?

Common symptoms include poor fuel efficiency, rough idling, lack of power, hesitation during acceleration, and an illuminated check engine light.

3. What causes the P015D code on a GMC Sierra?

Typical causes include a faulty oxygen sensor, exhaust leaks near the sensor, a dirty air filter, fuel system issues, or engine vacuum leaks.

4. Can I drive my 2016 GMC Sierra with a P015D code?

While you may be able to drive short distances, ignoring the code can lead to further engine damage, reduced fuel efficiency, and increased emissions.

5. How do I diagnose the P015D code on my GMC Sierra?

Start by checking for exhaust leaks, inspecting wiring and connections to the oxygen sensor, and using a scan tool to monitor live O2 sensor data for delayed response.

6. How do I fix the P015D code on a 2016 GMC Sierra?

Possible fixes include replacing the faulty oxygen sensor, repairing exhaust leaks, cleaning or replacing the air filter, or addressing any fuel delivery or vacuum issues.

7. Which oxygen sensor is affected by the P015D code?

The code pertains to the upstream oxygen sensor (Sensor 1) on Bank 2, which is the side of the engine opposite the cylinder with the #1 spark plug.

8. How much does it cost to fix the P015D code on a GMC Sierra?

The cost varies, but replacing the oxygen sensor typically ranges from $150 to $400, depending on labor and parts pricing.

9. Can a dirty air filter cause the P015D code?

Yes, a dirty or clogged air filter can cause an imbalance in the air-fuel mixture, potentially leading to delayed sensor response and triggering the code.

10. Will replacing the oxygen sensor always fix the P015D code?

Not alwaysâ€”while a faulty sensor is a common cause, other issues like exhaust leaks, vacuum leaks, or fuel system problems might also need to be addressed.