AutoCodes – GMC – P013F GMC

P013F GMC 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 GMC 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 2,792

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

What does this mean?

What are the Possible Causes of the DTC P013F GMC?

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 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 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 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 P013F GMC code?

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Information for Specific GMC Models

P013F 2014 GMC Sierra — HO2S Delay Response Lean to Rich Bank 1 Sensor 2
P013F 2015 GMC Sierra — HO2S Delay Response Lean to Rich Bank 1 Sensor 2
P013F 2016 GMC Sierra — HO2S Delay Response Lean to Rich Bank 1 Sensor 2
P013F 2017 GMC Sierra — HO2S Delay Response Lean to Rich Bank 1 Sensor 2
P013F 2018 GMC Sierra — HO2S Delay Response Lean to Rich Bank 1 Sensor 2

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 GMC Code

1. What does the OBDII code P013F mean on a GMC vehicle?

P013F indicates that the downstream oxygen sensor (Bank 1, Sensor 2) has a delayed response when transitioning from a lean to a rich condition.

2. What are the common symptoms of the P013F code?

Symptoms may include an illuminated Check Engine Light, reduced fuel efficiency, poor engine performance, or failed emissions tests.

3. What causes the P013F code to appear?

Common causes include a faulty oxygen sensor, exhaust leaks, a damaged catalytic converter, or issues with fuel delivery or the air-fuel mixture.

4. Which sensor is affected by the P013F code?

The affected sensor is the downstream oxygen sensor on Bank 1 (Sensor 2), located after the catalytic converter.

5. Can a bad catalytic converter cause the P013F code?

Yes, a damaged or clogged catalytic converter can lead to improper exhaust flow, causing delayed sensor response times and triggering this code.

6. How can I diagnose the P013F code?

Start by inspecting the wiring and connectors of the downstream oxygen sensor, check for exhaust leaks, and use a scan tool to monitor live oxygen sensor data for delayed switching behavior.

7. Is it safe to drive with the P013F code?

While it may be safe to drive short-term, prolonged driving with this code can lead to reduced fuel efficiency, emissions issues, and potential damage to other components.

8. How do I fix the P013F code?

Repairs may include replacing the oxygen sensor, fixing exhaust leaks, repairing wiring or connectors, or addressing fuel system or catalytic converter issues.

9. How much does it cost to repair the P013F code?

The cost varies depending on the issue, but replacing the oxygen sensor typically costs $100-$300, while catalytic converter repairs can be significantly more expensive.

10. Can a dirty air filter cause the P013F code?

An extremely dirty air filter may affect the air-fuel mixture but is unlikely to directly cause this code. However, itâ€™s good to check and replace it as part of routine maintenance.