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P0038 2016 Chevrolet Silverado Code - HO2S Heater Control Circuit High Voltage Bank 1 Sensor 2

Quick Answer

The P0038 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado refers to 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 this code is a malfunctioning HO2S on Bank 1 Sensor 2, Wiring Issues: Damage or corrosion to the wiring harness connected to the oxygen sensor can cause high voltage in the heater control circuit, ECM Malfunction: A problem with the engine control module (ECM) can also lead to issues with the oxygen sensor's heating element. 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 2016 Chevrolet Silverado indicates HO2S Heater Control Circuit High Voltage Bank 1 Sensor 2.
Common causes
Common causes include Faulty Oxygen Sensor: The most common cause of this code is a malfunctioning HO2S on Bank 1 Sensor 2, Wiring Issues: Damage or corrosion to the wiring harness connected to the oxygen sensor can cause high voltage in the heater control circuit, ECM Malfunction: A problem with the engine control module (ECM) can also lead to issues with the oxygen sensor's heating element.
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 17, 2024
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Code P0038 2016 Chevrolet Silverado Description

The P0038 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado refers to an issue with the HO2S (Heated Oxygen Sensor) Heater Control Circuit High Voltage for Bank 1 Sensor 2. This code indicates that there is a problem with the heating element circuit of the downstream oxygen sensor located after the catalytic converter on the bank 1 side of the engine. The oxygen sensor plays a crucial role in monitoring the oxygen levels in the exhaust gases, providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion.

OBDII Code P0038 2016 Chevrolet Silverado - HO2S Heater Control Circuit High Voltage Bank 1 Sensor 2
P0038 2016 Chevrolet Silverado Code - HO2S Heater Control Circuit High Voltage Bank 1 Sensor 2

Common Causes of P0038 2016 Chevrolet Silverado

  1. Faulty Oxygen Sensor: The most common cause of this code is a malfunctioning HO2S on Bank 1 Sensor 2.
  2. Wiring Issues: Damage or corrosion to the wiring harness connected to the oxygen sensor can cause high voltage in the heater control circuit.
  3. ECM Malfunction: A problem with the engine control module (ECM) can also lead to issues with the oxygen sensor's heating element.
  4. Exhaust Leak: A leak in the exhaust system near the oxygen sensor can cause high voltage in the heater control circuit.
  5. Short to Power: A short circuit to power in the oxygen sensor's wiring can trigger this code.

Symptoms of P0038 2016 Chevrolet Silverado

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
  2. Poor Fuel Economy: A malfunctioning oxygen sensor can cause the engine to run rich or lean, leading to decreased fuel efficiency.
  3. Rough Idling: The engine may experience rough idling or hesitation when the oxygen sensor is not functioning properly.
  4. Failed Emissions Test: A faulty oxygen sensor can cause the vehicle to fail emissions tests due to inaccurate readings being sent to the ECM.

How to Fix P0038 2016 Chevrolet Silverado

  1. Diagnose the Issue: Use a scan tool to retrieve the specific DTC and perform a visual inspection of the oxygen sensor and its wiring.
  2. Test the Oxygen Sensor: Check the resistance of the oxygen sensor's heating element to determine if it is functioning correctly.
  3. Inspect Wiring: Check the wiring harness for any damage, corrosion, or shorts that may be causing the high voltage issue.
  4. Replace Oxygen Sensor: If the oxygen sensor is faulty, replace it with a new sensor that meets the manufacturer's specifications.
  5. Clear DTCs: After completing the repair, clear the DTCs and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0038 2016 Chevrolet Silverado

The typical repair costs for addressing a P0038 code on a 2016 Chevrolet Silverado can range from $150 to $400, depending on the cost of the oxygen sensor and the labor involved in the repair process. It's important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It's recommended to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for P0038 2016 Chevrolet Silverado

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 P0038 2016 Chevrolet Silverado Code

1. What does the OBDII code P0038 on a 2016 Chevrolet Silverado mean?

The code P0038 indicates a high voltage condition in the heater control circuit of the Bank 1 Sensor 2 oxygen sensor (HO2S) in a 2016 Chevrolet Silverado.

2. What are the common symptoms of a P0038 code in a 2016 Chevrolet Silverado?

Common symptoms of a P0038 code may include poor fuel economy, rough idling, engine hesitation, and the illumination of the Check Engine Light on the dashboard.

3. What are the possible causes of a P0038 code on a 2016 Chevrolet Silverado?

Possible causes of a P0038 code include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, a blown fuse, or an issue with the engine control module (ECM).

4. How can I diagnose a P0038 code on my 2016 Chevrolet Silverado?

Diagnosing a P0038 code involves checking the wiring and connectors for any damage, testing the oxygen sensor's heater circuit for continuity, and using a scan tool to monitor sensor data and voltage readings.

5. Can I still drive my 2016 Chevrolet Silverado with a P0038 code?

It is generally not recommended to drive your vehicle with a P0038 code as it can affect fuel efficiency and engine performance. It's best to address the issue promptly to prevent further damage.

6. How can I repair a P0038 code on my 2016 Chevrolet Silverado?

Repairing a P0038 code may involve replacing the Bank 1 Sensor 2 oxygen sensor, repairing any damaged wiring or connectors, checking and replacing any blown fuses, or reprogramming the ECM if necessary.

7. Is it safe to reset the Check Engine Light after fixing a P0038 code on a 2016 Chevrolet Silverado?

Yes, once the underlying issue causing the P0038 code has been fixed, it is safe to reset the Check Engine Light using an OBDII scanner to clear the stored trouble codes.

8. How much does it cost to repair a P0038 code on a 2016 Chevrolet Silverado?

The cost of repairing a P0038 code can vary depending on the specific issue causing the code, the labor rates in your area, and whether you choose to do the repairs yourself or take your vehicle to a mechanic.

9. Can a P0038 code in a 2016 Chevrolet Silverado cause emissions problems?

Yes, a P0038 code can lead to increased emissions from the vehicle due to improper oxygen sensor function, potentially causing your vehicle to fail emissions tests in some areas.

10. How often should I replace the oxygen sensors in my 2016 Chevrolet Silverado to prevent a P0038 code?

Oxygen sensors typically have a lifespan of 60,000 to 100,000 miles, but it's recommended to follow the manufacturer's guidelines and have them inspected regularly to prevent issues like the P0038 code.

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