AutoCodes – GMC – P0057 GMC

P0057 GMC Code - HO2S Heater Control Circuit Low Voltage Bank 2 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 2 Sensor 2, Heated Oxygen Sensor Bank 2 Sensor 2 harness is open shorted, Heated Oxygen Sensor Bank 2 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: P0057 GMC indicates HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2.
Common causes: Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2, Heated Oxygen Sensor Bank 2 Sensor 2 harness is open shorted, Heated Oxygen Sensor Bank 2 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.

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Code Popularity 593

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 Mar 23, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0057 GMC Description

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach an operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensors to reach operating temperature. Voltage is provided to the heater by an ignition voltage circuit through a fuse. With the engine running, the ground is provided to the heater by the HO2S heater low control circuit through a low side driver within the Engine Control Module (ECM). The ECM uses Pulse Width Modulation (PWM) to control the HO2S heater operation to maintain a specific HO2S operating temperature range.
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.

OBDII Code P0057 GMC - HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2 - AutoCodes.com — P0057 GMC Code - HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0057 GMC?

Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2
Heated Oxygen Sensor Bank 2 Sensor 2 harness is open shorted
Heated Oxygen Sensor Bank 2 Sensor 2 circuit poor electrical connection
Heated Oxygen Sensor Bank 2 Sensor 2 circuit fuse
Faulty Engine Control Module (ECM)

How to Fix the DTC P0057 GMC?

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

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0057 GMC 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 P0057 GMC code?

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Information for Specific GMC Models

P0057 2014 GMC Sierra — HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2
P0057 2015 GMC Sierra — HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2
P0057 2016 GMC Sierra — HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2
P0057 2017 GMC Sierra — HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2
P0057 2018 GMC Sierra — HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2

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 P0057 GMC Code

1. What does the OBDII code P0057 GMC indicate?

- The code P0057 GMC refers to a malfunction in the HO2S (Heated Oxygen Sensor) heater control circuit for Bank 2 Sensor 2, indicating low voltage.

2. What are common symptoms of the P0057 GMC code?

- Common symptoms of P0057 GMC may include poor fuel economy, rough idling, engine misfires, and illumination of the Check Engine Light.

3. What are possible causes of the P0057 GMC code?

- Possible causes of P0057 GMC include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, a blown fuse, or a problem with the PCM (Powertrain Control Module).

4. How can I diagnose the P0057 GMC code?

- Diagnosing P0057 GMC involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor and related wiring, checking for blown fuses, and testing the sensor's resistance and voltage.

5. What are the repair options for the P0057 GMC code?

- Repair options for P0057 GMC may include replacing the faulty oxygen sensor, repairing damaged wiring or connectors, replacing blown fuses, or reprogramming the PCM if necessary.

6. Can I drive my vehicle with the P0057 GMC code?

- It is not recommended to drive your vehicle with the P0057 GMC code present, as it can lead to potential engine performance issues and may cause further damage if left unresolved.

7. How much does it cost to repair the P0057 GMC code?

- The cost of repairing the P0057 GMC code can vary depending on the underlying cause, but it may range from $100 to $300 for parts and labor.

8. How often does the P0057 GMC code occur in GMC vehicles?

- The P0057 GMC code can occur in GMC vehicles equipped with OBDII systems, particularly in models that use heated oxygen sensors for emissions control.

9. Are there any preventive maintenance tips to avoid the P0057 GMC code?

- To help prevent the P0057 GMC code, it is recommended to follow the manufacturer's recommended maintenance schedule, avoid rough driving conditions, and regularly inspect the oxygen sensor and related components.

10. Can a DIY enthusiast fix the P0057 GMC code at home?

- Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to diagnose and repair the P0057 GMC code at home by following step-by-step guides and using proper diagnostic equipment.