AutoCodes – Saturn – P0057 Saturn

P0057 Saturn 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 Saturn 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 377

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

What does this mean?

What are the Possible Causes of the DTC P0057 Saturn?

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 Saturn?

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 Saturn 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.

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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 P0057 Saturn Code

1. What are the common symptoms of OBDII code P0057 on a Saturn?

- Common symptoms include poor fuel economy, rough idling, engine hesitation, and potentially a Check Engine light illuminated on the dashboard.

2. What does the OBDII code P0057 on a Saturn indicate?

- The code P0057 indicates a malfunction in the HO2S (heated oxygen sensor) heater control circuit for Bank 2 Sensor 2, showing low voltage.

3. What are the possible causes of OBDII code P0057 on a Saturn?

- Possible causes include a faulty HO2S heater, damaged wiring or connectors in the heater circuit, a blown fuse, or issues with the engine control module (ECM).

4. How can I diagnose the source of OBDII code P0057 on my Saturn?

- To diagnose the issue, you can perform a visual inspection of the sensor and related wiring, check the fuses, use a multimeter to test the sensor resistance, and scan the ECM for other related trouble codes.

5. Can I continue driving my Saturn with OBDII code P0057 present?

- It is not recommended to drive the vehicle with the P0057 code present, as it can lead to poor engine performance and potentially cause further damage to the vehicle over time.

6. How can I repair OBDII code P0057 on my Saturn?

- Repair options include replacing the HO2S sensor, repairing or replacing damaged wiring or connectors, checking and replacing fuses if necessary, and resetting the fault codes.

7. Are there any tips to prevent OBDII code P0057 from occurring in the future on my Saturn?

- Regular maintenance, such as checking the condition of oxygen sensors during tune-ups, ensuring proper electrical connections, and using high-quality fuel, can help prevent the recurrence of this code.

8. Is it safe to clear the OBDII code P0057 on my Saturn without performing repairs?

- Clearing the code without addressing the underlying issue is not recommended, as the problem may persist and potentially lead to more severe engine problems in the future.

9. How much does it typically cost to repair OBDII code P0057 on a Saturn?

- The cost of repair can vary depending on the specific issue causing the code, but it may range from $100 to $300 for parts and labor.

10. Can a DIY enthusiast fix OBDII code P0057 on a Saturn?

- Depending on the skill level and experience with automotive repairs, a DIY enthusiast may be able to address the issue by following detailed repair guides and using the necessary tools and equipment.