AutoCodes – GMC – P0152 2017 GMC Sierra

P0152 2017 GMC Sierra Code - HO2S Circuit High Voltage Bank 2 Sensor 1

Quick Answer

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 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: P0152 2017 GMC Sierra indicates HO2S Circuit High Voltage Bank 2 Sensor 1.
Common causes: Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 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.

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Code Popularity 199

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 27, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0152 2017 GMC Sierra Description

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the Engine Control Module (ECM) operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0 - 1, 000 mV. Once sufficient HO2S voltage fluctuation is observed by the ECM, Closed Loop is entered. The ECM uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases toward 1, 000 mV indicates a rich fuel mixture. An HO2S voltage that decreases toward 0 mV indicates a lean fuel mixture.
The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the ECM to calculate the air-to-fuel ratio sooner.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the HO2S voltage is greater than 1, 050 mV.

OBDII Code P0152 2017 GMC Sierra - HO2S Circuit High Voltage Bank 2 Sensor 1 - AutoCodes.com — P0152 2017 GMC Sierra Code - HO2S Circuit High Voltage Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0152 2017 GMC Sierra?

Faulty Front Heated Oxygen Sensor Bank 2
Front Heated Oxygen Sensor Bank 2 harness is open or shorted
Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Low or high fuel system pressure
Fuel contamination
Faulty fuel injectors
Exhaust gas leaks
Engine vacuum leaks

How to Fix the DTC P0152 2017 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.

What does this mean?

Code Tech Notes

Replacing the Front Heated Oxygen Sensor (HO2S) Bank 2 usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0152 2017 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.

Need more information about the P0152 2017 GMC Sierra code?

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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 P0152 2017 GMC Sierra Code

What does the OBDII code P0152 mean for a 2017 GMC Sierra?

Code P0152 indicates that the oxygen sensor in Bank 2 Sensor 1 is reporting a high voltage, which suggests an overly rich air-fuel mixture.

What are the common symptoms of P0152 on a 2017 GMC Sierra?

Symptoms may include poor fuel economy, rough engine idle, reduced engine performance, and the check engine light illuminated.

What causes the P0152 code on a 2017 GMC Sierra?

Common causes include a faulty Bank 2 Sensor 1 oxygen sensor, damaged sensor wiring, a rich air-fuel mixture due to a leaking fuel injector, or issues with the PCM.

How can I fix the P0152 code on my 2017 GMC Sierra?

Repairs typically involve inspecting and replacing the Bank 2 Sensor 1 oxygen sensor if faulty, checking wiring for damage or shorts, or addressing fuel system issues like a leaking injector.

Can a bad oxygen sensor cause the P0152 code?

Yes, a failing Bank 2 Sensor 1 oxygen sensor can send incorrect voltage readings to the PCM, triggering the P0152 code.

Is it safe to drive my 2017 GMC Sierra with the P0152 code?

While it may be safe to drive for short distances, prolonged driving can lead to engine damage, poor performance, and increased emissions.

How do I know if the oxygen sensor is the problem for P0152?

You can test the oxygen sensor using a multimeter or OBDII scanner to check its voltage readings. If the readings are consistently high, the sensor may be faulty.

Could a fuel system issue trigger the P0152 code?

Yes, a leaking fuel injector or excessive fuel pressure can cause an overly rich air-fuel mixture, leading to high voltage readings from Bank 2 Sensor 1.

Do I need to replace the PCM if I get a P0152 code?

The PCM is rarely the culprit. Replace the PCM only after ruling out all other issues, such as sensor or wiring faults.

How much does it cost to fix the P0152 code on a 2017 GMC Sierra?

Repair costs vary depending on the issue. Replacing an oxygen sensor typically costs $150–$300, while fixing wiring or fuel system problems may cost more.