P0038 2017 GMC Sierra Code - HO2S Heater Control Circuit High Voltage Bank 1 Sensor 2
Quick Answer
The P0038 code for a 2017 GMC Sierra indicates an issue with the HO2S (Heated Oxygen Sensor) Heater Control Circuit High Voltage for Bank 1 Sensor 2. Common causes include Faulty Oxygen Sensor: The most common cause of the P0038 code is a malfunctioning HO2S sensor itself, Wiring Issues: Damaged or corroded wiring in the sensor's heater control circuit can cause high voltage readings, Blown Fuse: A blown fuse in the heater circuit can prevent the sensor from heating properly. 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
- P0038 2017 GMC Sierra indicates HO2S Heater Control Circuit High Voltage Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty Oxygen Sensor: The most common cause of the P0038 code is a malfunctioning HO2S sensor itself, Wiring Issues: Damaged or corroded wiring in the sensor's heater control circuit can cause high voltage readings, Blown Fuse: A blown fuse in the heater circuit can prevent the sensor from heating properly.
- 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 P0038 2017 GMC Sierra Description
The P0038 code for a 2017 GMC Sierra indicates an issue with the HO2S (Heated Oxygen Sensor) Heater Control Circuit High Voltage for Bank 1 Sensor 2. This sensor is responsible for monitoring the oxygen levels in the exhaust gases and sending this data to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. The heater control circuit in the sensor ensures that it reaches operating temperature quickly for accurate readings.
Common Causes of P0038 2017 GMC Sierra
- Faulty Oxygen Sensor: The most common cause of the P0038 code is a malfunctioning HO2S sensor itself.
- Wiring Issues: Damaged or corroded wiring in the sensor's heater control circuit can cause high voltage readings.
- Blown Fuse: A blown fuse in the heater circuit can prevent the sensor from heating properly.
- ECM Malfunction: A malfunctioning engine control module (ECM) can also trigger the P0038 code.
- Exhaust System Leaks: Leaks in the exhaust system can cause the sensor to heat up more than necessary.
Symptoms of P0038 2017 GMC Sierra
- Check Engine Light: The most common symptom associated with the P0038 code is the illumination of the check engine light on the vehicle's dashboard.
- Decreased Fuel Efficiency: A faulty HO2S heater control circuit can lead to an incorrect air-fuel mixture, resulting in decreased fuel efficiency.
- Rough Idle: The engine may experience rough idling or hesitation during acceleration due to incorrect oxygen level readings.
- Failed Emissions Test: If the issue is not resolved, it can cause increased emissions, potentially leading to a failed emissions test.
- Engine Misfires: In severe cases, the engine may experience misfires due to incorrect air-fuel mixture caused by the faulty sensor.
How to Fix P0038 2017 GMC Sierra
- Diagnose the Issue: Use an OBD-II scanner to retrieve the specific trouble code and determine if it is indeed the HO2S heater control circuit issue.
- Inspect Wiring and Connections: Check the wiring and connections to the sensor for any damage or corrosion. Repair or replace as needed.
- Test the Sensor: Test the HO2S sensor using a multimeter to ensure it is functioning correctly.
- Replace the Oxygen Sensor: If the sensor is faulty, replace it with a new one, ensuring it is compatible with your vehicle.
- Clear the Codes: Once the repair is complete, clear the codes and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0038 2017 GMC Sierra
The typical repair costs for addressing the P0038 code on a 2017 GMC Sierra can range from $150 to $300, including parts and labor. This estimate may vary depending on the location, make and model of the vehicle, and the rates of the auto repair shop. It is recommended to check with local shops for a more accurate estimate based on your specific situation. Keep in mind that additional costs may apply if other issues are discovered during the diagnostic process.
Tech Notes for P0038 2017 GMC Sierra
Need more information about the P0038 2017 GMC Sierra code?
Need more information on how to fix the P0038 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0038 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0038 2017 GMC Sierra Code
What does the OBDII code P0038 mean on a 2017 GMC Sierra?
P0038 indicates a high-voltage issue in the Heater Control Circuit for the Oxygen Sensor (HO2S) on Bank 1, Sensor 2, which is located downstream of the catalytic converter.
What are the common symptoms of P0038 on a 2017 GMC Sierra?
Symptoms may include an illuminated check engine light, decreased fuel efficiency, rough idling, or failure to pass an emissions test.
What causes the P0038 code to appear on a 2017 GMC Sierra?
Common causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or a malfunctioning powertrain control module (PCM).
Is it safe to drive a 2017 GMC Sierra with the P0038 code?
While the vehicle may still be drivable, ignoring the code can lead to reduced fuel efficiency and potential damage to the catalytic converter over time.
How do I diagnose the P0038 code on a 2017 GMC Sierra?
Start by visually inspecting the wiring and connectors for damage, check the fuse for the oxygen sensor heater circuit, and use a multimeter to test the sensor and circuit for proper voltage.
Can a faulty oxygen sensor cause the P0038 code on a 2017 GMC Sierra?
Yes, a faulty oxygen sensor is one of the most common causes of the P0038 code.
What tools do I need to fix the P0038 code on a 2017 GMC Sierra?
You may need an OBDII scanner, a multimeter, replacement oxygen sensor, and basic hand tools for repairs.
How much does it cost to repair the P0038 code on a 2017 GMC Sierra?
Repairs can range from $50 to $300, depending on whether the issue is a simple wiring fix or a full oxygen sensor replacement.
Can a blown fuse trigger the P0038 code on a 2017 GMC Sierra?
Yes, a blown fuse in the heater control circuit can cause the P0038 code to appear.
How can the P0038 code be cleared on a 2017 GMC Sierra?
After fixing the issue, the code can be cleared using an OBDII scanner, or it may clear itself after several driving cycles if the problem is resolved.
Discuss the causes and fixes for P0038 2017 GMC Sierra OBDII Code
Code P0038 2017 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.