P0037 2018 GMC Sierra Code - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2
Quick Answer
The P0037 code for the 2018 GMC Sierra indicates an issue with the HO2S (Heated Oxygen Sensor) Heater Control Circuit on Bank 1 Sensor 2. Common causes include Faulty Oxygen Sensor: The Bank 1 Sensor 2 HO2S may be malfunctioning, causing the heater control circuit to operate at low voltage, Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the heater control circuit, ECM Malfunction: A problem with the engine control module can prevent proper communication with the sensor, leading to low voltage issues. 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 2018 GMC Sierra indicates HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty Oxygen Sensor: The Bank 1 Sensor 2 HO2S may be malfunctioning, causing the heater control circuit to operate at low voltage, Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the heater control circuit, ECM Malfunction: A problem with the engine control module can prevent proper communication with the sensor, leading to low voltage issues.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0037 2018 GMC Sierra Description
The P0037 code for the 2018 GMC Sierra indicates an issue with the HO2S (Heated Oxygen Sensor) Heater Control Circuit on Bank 1 Sensor 2. This sensor is responsible for monitoring the oxygen levels in the exhaust gases and providing feedback to the engine control module (ECM) for proper air-fuel ratio adjustments. The heater control circuit is designed to heat up the sensor quickly to operating temperature for accurate readings.
Common Causes of P0037 2018 GMC Sierra
- Faulty Oxygen Sensor: The Bank 1 Sensor 2 HO2S may be malfunctioning, causing the heater control circuit to operate at low voltage.
- Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the heater control circuit.
- ECM Malfunction: A problem with the engine control module can prevent proper communication with the sensor, leading to low voltage issues.
- Heater Element Failure: The heating element inside the oxygen sensor may be faulty, preventing it from reaching the necessary operating temperature.
Symptoms of P0037 2018 GMC Sierra
- Check Engine Light: The most common symptom associated with the P0037 code is the illumination of the Check Engine Light on the vehicle's dashboard.
- Poor Fuel Economy: A faulty HO2S heater control circuit can lead to incorrect air-fuel ratio adjustments, resulting in decreased fuel efficiency.
- Rough Idling: The engine may experience rough idling or hesitation when the sensor is not providing accurate readings.
- Reduced Engine Performance: The vehicle may exhibit decreased acceleration and overall performance due to inaccurate sensor data.
How to Fix P0037 2018 GMC Sierra
- Diagnose the Issue: Use an OBD-II scanner to retrieve the specific trouble code (P0037) and investigate the HO2S heater control circuit for Bank 1 Sensor 2.
- Inspect Wiring: Check the wiring harness for any damage or corrosion and repair or replace as needed.
- Test Oxygen Sensor: Verify the functionality of the Bank 1 Sensor 2 HO2S by testing the heater element and voltage output.
- Replace Oxygen Sensor: If the sensor is determined to be faulty, replace it with a new one and clear the trouble code from the ECM.
- Clear Codes and Test Drive: After completing the repair, clear the diagnostic trouble codes from the ECM and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0037 2018 GMC Sierra
The typical repair costs for addressing the P0037 code on a 2018 GMC Sierra can range from $150 to $400, depending on the specific cause of the issue and the price of parts and labor in your area. This estimate includes the cost of a new oxygen sensor, wiring repairs, and diagnostic labor. It's important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Be sure to check with local shops for a more accurate estimate based on your location and vehicle specifics.
Tech Notes for P0037 2018 GMC Sierra
Need more information about the P0037 2018 GMC Sierra code?
Need more information on how to fix the P0037 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0037 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0037 2018 GMC Sierra Code
1. What are the common symptoms of OBDII code P0037 in a 2018 GMC Sierra?
- Common symptoms include decreased fuel efficiency, rough idling, and the illumination of the check engine light.
2. What does the OBDII code P0037, "HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2," indicate in a 2018 GMC Sierra?
- This code indicates that there is a low voltage condition in the heater control circuit of the oxygen sensor located after the catalytic converter on bank 1.
3. What are the possible causes of OBDII code P0037 in a 2018 GMC Sierra?
- Possible causes include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, a blown fuse, or issues with the engine control module.
4. How can I diagnose the OBDII code P0037 in my 2018 GMC Sierra?
- To diagnose this code, you can use an OBDII scanner to retrieve the code, visually inspect the sensor and its wiring for damage, check the fuse related to the sensor heater circuit, and perform electrical tests on the sensor and related components.
5. Can I continue driving my 2018 GMC Sierra with OBDII code P0037?
- It is not recommended to continue driving with this code as it can impact your vehicle's performance and emissions. It's best to address the underlying issue promptly.
6. How can I repair OBDII code P0037 in a 2018 GMC Sierra?
- Repair options include replacing the oxygen sensor, repairing or replacing damaged wiring or connectors, checking and replacing fuses if necessary, and resetting the fault code with an OBDII scanner.
7. Is it possible to clear OBDII code P0037 in a 2018 GMC Sierra without fixing the underlying issue?
- While you can clear the code temporarily, the check engine light will likely reappear if the root cause is not addressed. It's recommended to fix the issue to prevent further problems.
8. Will OBDII code P0037 cause my 2018 GMC Sierra to fail an emissions test?
- Yes, OBDII code P0037 can cause your vehicle to fail an emissions test due to its impact on the oxygen sensor's performance and the vehicle's emissions control system.
9. How much does it typically cost to repair OBDII code P0037 in a 2018 GMC Sierra?
- The cost of repair can vary depending on the root cause of the issue, but it generally ranges from around $150 to $400, including parts and labor.
10. How often does OBDII code P0037 occur in a 2018 GMC Sierra?
- The occurrence of this code can vary depending on driving conditions and maintenance history, but it is not an extremely common issue in a 2018 GMC Sierra.
Discuss the causes and fixes for P0037 2018 GMC Sierra OBDII Code
Code P0037 2018 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.