AutoCodes – GMC – P013D 2016 GMC Sierra

P013D 2016 GMC Sierra Code - HO2S Slow Response Lean to Rich Bank 2 Sensor 2

Quick Answer

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Heated Oxygen Bank 2 Sensor 2, Heated Oxygen Bank 2 Sensor 2 harness is open or shorted, Heated Oxygen Bank 2 Sensor 2 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P013D 2016 GMC Sierra indicates HO2S Slow Response Lean to Rich Bank 2 Sensor 2.
Common causes: Common causes include Faulty Heated Oxygen Bank 2 Sensor 2, Heated Oxygen Bank 2 Sensor 2 harness is open or shorted, Heated Oxygen Bank 2 Sensor 2 circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 187

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 28, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P013D 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 accumulated mass airflow monitored during lean-to-rich transitions between 350 - 650 mV is greater than calibrated value.

OBDII Code P013D 2016 GMC Sierra - HO2S Slow Response Lean to Rich Bank 2 Sensor 2 - AutoCodes.com — P013D 2016 GMC Sierra Code - HO2S Slow Response Lean to Rich Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P013D 2016 GMC Sierra?

Faulty Heated Oxygen Bank 2 Sensor 2
Heated Oxygen Bank 2 Sensor 2 harness is open or shorted
Heated Oxygen Bank 2 Sensor 2 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 P013D 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 Rear Heated Oxygen Sensors (HO2S) usually takes care of the problem.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P013D 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.

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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 P013D 2016 GMC Sierra Code

1. What does the OBDII code P013D mean for a 2016 GMC Sierra?

P013D indicates "HO2S Slow Response Lean to Rich Bank 2 Sensor 2," meaning the oxygen sensor on bank 2 (downstream sensor) is taking too long to switch from a lean to rich condition.

2. What are common symptoms of the P013D code on a 2016 GMC Sierra?

Symptoms may include the check engine light turning on, decreased fuel efficiency, rough idling, or failed emissions tests.

3. What causes the P013D code to appear?

Common causes include a failing oxygen sensor, exhaust leaks, wiring or connector issues, or an inefficient catalytic converter.

4. Which oxygen sensor is affected by the P013D code?

The code refers to the downstream oxygen sensor (Sensor 2) on bank 2 of the engine, which monitors the catalytic converter's performance.

5. Can a dirty or faulty catalytic converter trigger the P013D code?

Yes, a degraded catalytic converter can cause improper exhaust flow, leading to delayed sensor response and triggering the P013D code.

6. How do you diagnose the P013D code on a 2016 GMC Sierra?

Start by inspecting the oxygen sensor wiring and connector for damage. Use a scan tool to monitor the sensor's response time and check for exhaust leaks before replacing components.

7. Can an exhaust leak cause the P013D code?

Yes, an exhaust leak upstream of the oxygen sensor can disrupt its readings and cause slow response times, triggering the code.

8. What is the most common fix for the P013D code?

The most common fix is replacing the downstream oxygen sensor on bank 2, though repairs may also involve fixing wiring, exhaust leaks, or replacing the catalytic converter.

9. Is it safe to drive with the P013D code on a 2016 GMC Sierra?

Driving with this code is generally safe in the short term, but prolonged issues can cause further damage, reduced fuel efficiency, and emissions problems.

10. How much does it cost to repair the P013D code on a 2016 GMC Sierra?

The cost varies depending on the cause, but replacing the oxygen sensor typically costs $150â€“$300, while catalytic converter repairs can be significantly higher.