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Engine-Codes – GMC – P0037 2016 GMC Sierra

P0037 2016 GMC Sierra Code - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2

Quick Answer

The P0037 code for a 2016 GMC Sierra indicates a problem with the HO2S (Heated Oxygen Sensor) Heater Control Circuit for Bank 1 Sensor 2. Common causes include Faulty Oxygen Sensor: The most common cause of the P0037 code is a malfunctioning oxygen sensor heater, Wiring Issues: Damaged or corroded wiring in the heater control circuit can lead to low voltage, Bad Fuse: A blown fuse in the oxygen sensor heater circuit can cause the low voltage issue. 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
P0037 2016 GMC Sierra indicates HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2.
Common causes
Common causes include Faulty Oxygen Sensor: The most common cause of the P0037 code is a malfunctioning oxygen sensor heater, Wiring Issues: Damaged or corroded wiring in the heater control circuit can lead to low voltage, Bad Fuse: A blown fuse in the oxygen sensor heater circuit can cause the low voltage issue.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0037 2016 GMC Sierra Description

The P0037 code for a 2016 GMC Sierra indicates a problem with the HO2S (Heated Oxygen Sensor) Heater Control Circuit for Bank 1 Sensor 2. This means that the heating element in the oxygen sensor located downstream from the catalytic converter on bank 1 is experiencing low voltage. The purpose of the heated oxygen sensor is to measure the amount of oxygen in the exhaust gases, allowing the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. The heater control circuit is responsible for maintaining the sensor at the correct operating temperature for accurate readings.

OBDII Code P0037 2016 GMC Sierra - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2
P0037 2016 GMC Sierra Code - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2

Common Causes of P0037 2016 GMC Sierra

  1. Faulty Oxygen Sensor: The most common cause of the P0037 code is a malfunctioning oxygen sensor heater.
  2. Wiring Issues: Damaged or corroded wiring in the heater control circuit can lead to low voltage.
  3. Bad Fuse: A blown fuse in the oxygen sensor heater circuit can cause the low voltage issue.
  4. ECM Failure: In rare cases, a problem with the engine control module can prevent the oxygen sensor heater from receiving the proper voltage.

Symptoms of P0037 2016 GMC Sierra

  1. Check Engine Light: The most common symptom of the P0037 code is the illumination of the Check Engine Light on the dashboard.
  2. Poor Fuel Economy: A faulty oxygen sensor can cause the engine to run rich or lean, leading to decreased fuel efficiency.
  3. Rough Idle: The engine may idle roughly or stall due to incorrect air-fuel mixture readings.
  4. Reduced Engine Performance: The vehicle may lack power or responsiveness due to improper fuel adjustment.
  5. Increased Emissions: A malfunctioning oxygen sensor can cause higher emissions levels, potentially leading to a failed emissions test.

How to Fix P0037 2016 GMC Sierra

  1. Diagnose the Issue: Use a scan tool to read the code and determine if the heater control circuit is causing the problem.
  2. Inspect Wiring and Fuse: Check the wiring and fuse for any damage or corrosion, and replace as needed.
  3. Test Oxygen Sensor: Test the oxygen sensor to ensure it is functioning properly; replace if necessary.
  4. Clear the Code: After making repairs, clear the code using the scan tool to reset the Check Engine Light.
  5. Test Drive: Take the vehicle for a test drive to ensure the issue has been resolved and that the oxygen sensor is providing accurate data.

Cost to Fix P0037 2016 GMC Sierra

The typical repair costs for addressing a P0037 code on a 2016 GMC Sierra can range from $150 to $400, including parts and labor. This estimate may vary depending on the location, the specific make and model of the vehicle, and the type of engine. Additionally, the diagnosis time and labor rates at auto repair shops can impact the final cost. It's recommended to check with local auto repair shops for a more accurate estimate based on individual circumstances.

What does this mean?

Tech Notes for P0037 2016 GMC Sierra

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.

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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 P0037 2016 GMC Sierra Code

1. What does the OBDII code P0037 mean on a 2016 GMC Sierra?

P0037 indicates a low voltage issue in the heater control circuit for the oxygen sensor located on Bank 1, Sensor 2.

2. What are the symptoms of code P0037 on a GMC Sierra?

Common symptoms include an illuminated check engine light, decreased fuel efficiency, and potential failure to pass emissions tests.

3. What causes the P0037 code on a 2016 GMC Sierra?

Causes can include a faulty oxygen sensor (Bank 1, Sensor 2), damaged wiring or connectors, a blown fuse, or a malfunctioning engine control module (ECM).

4. Is it safe to drive with the P0037 code on a GMC Sierra?

While the vehicle may still be drivable, prolonged use with this code can lead to reduced fuel efficiency and potential damage to the catalytic converter.

5. How do I fix the P0037 code on my 2016 GMC Sierra?

Repairs typically involve inspecting and replacing the oxygen sensor, repairing damaged wiring or connectors, and checking fuses related to the sensor circuit.

6. How do I locate Bank 1, Sensor 2 on my GMC Sierra?

Bank 1 refers to the side of the engine with cylinder 1, and Sensor 2 is the downstream oxygen sensor located after the catalytic converter.

7. How much does it cost to repair the P0037 code on a GMC Sierra?

The cost varies but can range from $100 to $300 for parts and labor to replace the oxygen sensor, depending on location and shop rates.

8. Can a bad oxygen sensor cause the P0037 code?

Yes, a faulty or failing oxygen sensor is one of the most common causes of the P0037 code.

9. What tools are needed to diagnose the P0037 code?

You’ll typically need an OBDII scanner, a multimeter for testing voltage, and basic hand tools to inspect and replace the sensor or wiring.

10. Can a software update fix the P0037 code on a GMC Sierra?

While rare, a software update to the ECM might resolve the issue if it’s related to a programming error; consult your dealer to confirm.

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