AutoCodes – GMC – P013F 2018 GMC Sierra

P013F 2018 GMC Sierra Code - HO2S Delay Response Lean to Rich Bank 1 Sensor 2

Quick Answer

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Heated Oxygen Bank 1 Sensor 2, Heated Oxygen Bank 1 Sensor 2 harness is open or shorted, Heated Oxygen Bank 1 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: P013F 2018 GMC Sierra indicates HO2S Delay Response Lean to Rich Bank 1 Sensor 2.
Common causes: Common causes include Faulty Heated Oxygen Bank 1 Sensor 2, Heated Oxygen Bank 1 Sensor 2 harness is open or shorted, Heated Oxygen Bank 1 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 182

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 P013F 2018 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 O2 sensor voltage has not increased above 350 mV within a calibrated value of accumulated airflow.

OBDII Code P013F 2018 GMC Sierra - HO2S Delay Response Lean to Rich Bank 1 Sensor 2 - AutoCodes.com — P013F 2018 GMC Sierra Code - HO2S Delay Response Lean to Rich Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P013F 2018 GMC Sierra?

Faulty Heated Oxygen Bank 1 Sensor 2
Heated Oxygen Bank 1 Sensor 2 harness is open or shorted
Heated Oxygen Bank 1 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 P013F 2018 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 P013F 2018 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 P013F 2018 GMC Sierra 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 P013F 2018 GMC Sierra Code

What does the OBDII code P013F mean on a 2018 GMC Sierra?

P013F indicates that the oxygen sensor (HO2S) on Bank 1, Sensor 2, is taking too long to switch from a lean to a rich condition, signaling a possible issue with the sensor or exhaust system.

What are the common symptoms of a P013F code?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, rough idling, or difficulty passing emissions tests.

What causes the P013F code to appear?

Possible causes include a faulty downstream oxygen sensor (Bank 1, Sensor 2), exhaust leaks, wiring or connector issues, or contamination of the sensor.

How serious is the P013F code?

While it may not cause immediate drivability issues, ignoring the code can lead to decreased fuel efficiency and potential damage to the catalytic converter over time.

Can a dirty or clogged catalytic converter trigger a P013F code?

Yes, a clogged catalytic converter can affect exhaust flow, potentially leading to delayed oxygen sensor response and triggering the code.

How can I fix the P013F code on my 2018 GMC Sierra?

Start by inspecting the wiring and connectors for damage, checking for exhaust leaks, and testing the oxygen sensor. Replace the sensor if it's faulty.

Is it safe to drive with a P013F code?

It is generally safe to drive short-term, but prolonged driving with this issue can cause further damage and may decrease fuel efficiency.

How do you test the Bank 1, Sensor 2 oxygen sensor?

Use a multimeter or scan tool to monitor the sensor's voltage and response time. Compare the readings to manufacturer specifications to determine if itâ€™s functioning correctly.

Can a P013F code be caused by bad fuel quality?

Yes, poor fuel quality or contaminated fuel can impact combustion and exhaust, potentially affecting oxygen sensor response times.

Will replacing the oxygen sensor always fix a P013F code?

Not necessarily. While replacing the oxygen sensor is a common fix, you should also check for exhaust leaks, wiring issues, and other related problems to ensure the root cause is resolved.