AutoCodes – GMC – P013C GMC

P013C GMC Code - HO2S Slow Response Rich to Lean 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: P013C GMC indicates HO2S Slow Response Rich to Lean 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 2,760

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 P013C 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 accumulated mass airflow monitored during rich-to-lean transitions between 450 - 150 mV is greater than calibrated value.

OBDII Code P013C GMC - HO2S Slow Response Rich to Lean Bank 2 Sensor 2 - AutoCodes.com — P013C GMC Code - HO2S Slow Response Rich to Lean Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P013C GMC?

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 P013C 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 P013C 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 P013C GMC code?

Need more information on how to fix the P013C GMC code? Get Access to Factory Service Manuals

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Information for Specific GMC Models

P013C 2014 GMC Sierra — HO2S Slow Response Rich to Lean Bank 2 Sensor 2
P013C 2015 GMC Sierra — HO2S Slow Response Rich to Lean Bank 2 Sensor 2
P013C 2016 GMC Sierra — HO2S Slow Response Rich to Lean Bank 2 Sensor 2
P013C 2017 GMC Sierra — HO2S Slow Response Rich to Lean Bank 2 Sensor 2
P013C 2018 GMC Sierra — HO2S Slow Response Rich to Lean Bank 2 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 P013C GMC Code

1. What are the common symptoms of OBDII code P013C GMC?

- Common symptoms include rough idling, poor fuel efficiency, engine hesitation, and a noticeable decrease in overall engine performance.

2. What causes the HO2S slow response rich to lean Bank 2 Sensor 2 code?

- The code P013C GMC is typically triggered by a faulty or failing Bank 2 Sensor 2 oxygen (O2) sensor, which measures the air-fuel ratio in the exhaust gases.

3. How can I diagnose the cause of OBDII code P013C GMC?

- To diagnose the issue, you can use an OBDII scanner to read the code and inspect the Bank 2 Sensor 2 oxygen sensor for any signs of damage or malfunction.

4. Can a dirty or contaminated fuel system trigger the P013C GMC code?

- Yes, a dirty or contaminated fuel system can affect the air-fuel ratio readings, potentially leading to a slow response rich to lean condition and triggering the code.

5. What are some repair tips for addressing the HO2S slow response rich to lean Bank 2 Sensor 2 code?

- Repair tips may include replacing the Bank 2 Sensor 2 oxygen sensor, checking and cleaning the fuel system, and ensuring there are no exhaust leaks affecting sensor readings.

6. Is it safe to continue driving with the P013C GMC trouble code?

- While the vehicle may still be operable with the code present, it is recommended to address the issue promptly to prevent further damage to the engine or emissions system.

7. Will resetting the check engine light manually clear the P013C GMC code?

- Resetting the check engine light may temporarily clear the code, but it is important to diagnose and address the underlying issue to prevent the code from reoccurring.

8. Can extreme weather conditions impact the performance of the Bank 2 Sensor 2 oxygen sensor?

- Extreme weather conditions, such as extreme heat or cold, can affect the performance of the oxygen sensor and potentially contribute to a slow response rich to lean condition.

9. Are there any specific maintenance practices that can help prevent the P013C GMC trouble code?

- Regularly inspecting and replacing oxygen sensors as part of routine maintenance can help prevent issues like the P013C GMC trouble code from occurring.

10. How much does it typically cost to repair the HO2S slow response rich to lean Bank 2 Sensor 2 code?

- The cost of repairing the P013C GMC code can vary depending on the cause of the issue, but it may involve sensor replacement, which can range from $100 to $300 including parts and labor.