P0037 2016 GMC Sierra Code - HO2S Heater Control Circuit Low Voltage 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
- P0037 2016 GMC Sierra indicates HO2S Heater Control Circuit Low Voltage 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.
Code P0037 2016 GMC Sierra Description
The Diagnostic Trouble Code (DTC) will be set when the ECM detects a short to ground in the heater output low side driver circuit of the heated oxygen sensor when the heater is commanded OFF for greater than 5 s.
What are the Possible Causes of the DTC P0037 2016 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 P0037 2016 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0037 2016 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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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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