P0057 2018 GMC Sierra 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 2018 GMC Sierra 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.
Code P0057 2018 GMC Sierra Description
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.
What are the Possible Causes of the DTC P0057 2018 GMC Sierra?
- 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 2018 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0057 2018 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.
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Frequently Asked Questions about P0057 2018 GMC Sierra Code
1. What does the OBDII code P0057 mean on a 2018 GMC Sierra?
P0057 indicates a problem with the HO2S (Heated Oxygen Sensor) Heater Control Circuit Low Voltage for Bank 2 Sensor 2, meaning the heater circuit is not functioning correctly.
2. What are the symptoms of P0057 on a 2018 GMC Sierra?
Common symptoms include an illuminated check engine light, reduced fuel efficiency, rough idling, and possible difficulty passing emissions tests.
3. What causes the P0057 code on a 2018 GMC Sierra?
Possible causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or a malfunctioning powertrain control module (PCM).
4. Which oxygen sensor does P0057 refer to on a 2018 GMC Sierra?
P0057 refers to the downstream oxygen sensor (Sensor 2) on Bank 2, which is the side of the engine opposite the number one cylinder.
5. Can I drive my 2018 GMC Sierra with the P0057 code?
Driving with the P0057 code is possible but not recommended, as it may lead to reduced performance, poor fuel economy, and potential damage to the catalytic converter over time.
6. How do I diagnose the P0057 code on a 2018 GMC Sierra?
Start by inspecting the wiring and connectors for damage, checking the oxygen sensor heater resistance with a multimeter, and verifying proper voltage supply to the heater circuit.
7. How do I fix the P0057 code on a 2018 GMC Sierra?
Repairs may include replacing the faulty oxygen sensor, repairing damaged wiring, replacing a blown fuse, or reprogramming/updating the PCM if needed.
8. How much does it cost to repair the P0057 code on a 2018 GMC Sierra?
Repair costs can range from $100 to $300, depending on whether you replace the oxygen sensor or repair wiring issues. Labor rates and diagnostic fees may vary.
9. Can a bad fuse trigger the P0057 code on a 2018 GMC Sierra?
Yes, a blown fuse in the oxygen sensor heater circuit can cause insufficient voltage and trigger the P0057 code.
10. What tools are needed to diagnose the P0057 code on a 2018 GMC Sierra?
You’ll need an OBDII scanner, a multimeter, and possibly a wiring diagram to check for voltage, resistance, or continuity in the heater circuit.
Discuss the causes and fixes for P0057 2018 GMC Sierra OBDII Code
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