AutoCodes – GMC – P0036 2017 GMC Sierra

P0036 2017 GMC Sierra Code - HO2S Heater Control Circuit Bank 1 Sensor 2

Quick Answer

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2, Heated Oxygen Sensor Bank 1 Sensor 2 harness is open shorted to ground, Heated Oxygen Sensor 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: P0036 2017 GMC Sierra indicates HO2S Heater Control Circuit Bank 1 Sensor 2.
Common causes: Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2, Heated Oxygen Sensor Bank 1 Sensor 2 harness is open shorted to ground, Heated Oxygen Sensor 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 255

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 Mar 25, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0036 2017 GMC Sierra Description

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach an operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensors to reach operating temperature. Voltage is provided to the heater by an ignition voltage circuit through a fuse. With the engine running, the ground is provided to the heater by the HO2S heater low control circuit through a low side driver within the Engine Control Module (ECM). The ECM uses Pulse Width Modulation (PWM) to control the HO2S heater operation to maintain a specific HO2S operating temperature range.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects an open circuit in the heater output low side driver circuit of the heated oxygen sensor when the heater is commanded OFF for greater than 5 s.

OBDII Code P0036 2017 GMC Sierra - HO2S Heater Control Circuit Bank 1 Sensor 2 - AutoCodes.com — P0036 2017 GMC Sierra Code - HO2S Heater Control Circuit Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0036 2017 GMC Sierra?

Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2
Heated Oxygen Sensor Bank 1 Sensor 2 harness is open shorted to ground
Heated Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection
Heated Oxygen Sensor Bank 1 Sensor 2 circuit fuse
Faulty Engine Control Module (ECM)

How to Fix the DTC P0036 2017 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

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it takes the sensor to warm up and start sending an adequate signal. The code is set when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can cause the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the fuse and connector are OK, replacing the O2 Sensor usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0036 2017 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 P0036 2017 GMC Sierra Code

1. What does OBDII code P0036 mean for a 2017 GMC Sierra?

The code P0036 indicates a malfunction in the HO2S (Heated Oxygen Sensor) heater control circuit for Bank 1 Sensor 2 in your GMC Sierra.

2. What are the common symptoms of OBDII code P0036 in a GMC Sierra?

Common symptoms of code P0036 include poor fuel economy, rough idle, hesitation during acceleration, and the illumination of the Check Engine Light.

3. What are the possible causes of OBDII code P0036 in a 2017 GMC Sierra?

Potential causes of code P0036 include a faulty HO2S heater, damaged wiring or connectors in the heater circuit, a blown fuse, or a problem with the engine control module (ECM).

4. How can I diagnose the OBDII code P0036 in my GMC Sierra?

Diagnosing code P0036 involves checking the HO2S heater circuit for continuity, inspecting the wiring and connectors for damage, testing the fuse related to the heater circuit, and verifying the ECM operation.

5. Can I drive my GMC Sierra with OBDII code P0036?

It is not recommended to drive your GMC Sierra with a persistent P0036 code, as it can lead to reduced fuel efficiency and potential damage to the catalytic converter.

6. How much does it cost to repair OBDII code P0036 in a 2017 GMC Sierra?

The cost of repairing code P0036 can vary depending on the exact cause of the issue. Repairs may involve replacing the HO2S sensor, repairing wiring or connectors, or addressing ECM-related issues.

7. Are there any DIY tips for fixing OBDII code P0036 in a GMC Sierra?

DIY tips for addressing code P0036 include checking and replacing the fuse if necessary, inspecting wiring for damage, and ensuring proper connections in the heater circuit.

8. How long does it take to repair OBDII code P0036 in a GMC Sierra?

The repair time for code P0036 can vary based on the specific cause of the issue and the expertise of the person performing the repair. It may take anywhere from half an hour to a few hours.

9. Can a faulty O2 sensor cause OBDII code P0036 in a GMC Sierra?

Yes, a faulty HO2S (O2) sensor can lead to the triggering of code P0036 in a GMC Sierra due to issues with the heater control circuit for Bank 1 Sensor 2.

10. Will resetting the Check Engine Light clear OBDII code P0036 in a GMC Sierra?

Resetting the Check Engine Light may temporarily clear code P0036, but the underlying issue causing the code will need to be addressed to prevent it from reoccurring.