P0057 Infiniti Code - HO2S22 Heater Control Circuit Low
Quick Answer
Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 harness is open shorted, Heated Oxygen Sensor (H2OS) 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 Infiniti indicates HO2S22 Heater Control Circuit Low.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 harness is open shorted, Heated Oxygen Sensor (H2OS) 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 Infiniti Description
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
What are the Possible Causes of the DTC P0057 Infiniti?
- Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 harness is open shorted
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 circuit poor electrical connection
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 circuit fuse
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0057 Infiniti?
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 Infiniti 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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Information for Specific Infiniti Models
- P0057 2003 Infiniti G35 — HO2S22 Heater Control Circuit Low
- P0057 2004 Infiniti G35 — HO2S22 Heater Control Circuit Low
- P0057 2005 Infiniti G35 — HO2S22 Heater Control Circuit Low
- P0057 2006 Infiniti G35 — HO2S22 Heater Control Circuit Low
Frequently Asked Questions about P0057 Infiniti Code
1. What does the OBDII code P0057 mean on an Infiniti?
P0057 indicates a problem with the Heater Control Circuit Low for the downstream oxygen sensor (HO2S22) on Bank 2.
2. What are the common symptoms of code P0057 in an Infiniti?
Symptoms may include a check engine light, reduced fuel efficiency, failed emissions tests, or no noticeable performance changes in some cases.
3. What causes the P0057 code on an Infiniti?
Common causes include a faulty oxygen sensor, damaged wiring or connectors in the heater circuit, a blown fuse, or a malfunctioning powertrain control module (PCM).
4. How do I diagnose the P0057 code on my Infiniti?
Check the wiring and connectors for damage or corrosion, test the oxygen sensor heater element with a multimeter, and ensure proper voltage and ground at the sensor.
5. Can I drive my Infiniti with a P0057 code?
While it may be safe to drive short-term, ignoring the issue can lead to increased emissions, reduced fuel economy, or damage to other components.
6. How do I fix the P0057 code on my Infiniti?
Repairs might include replacing the oxygen sensor, repairing damaged wiring, replacing a blown fuse, or, in rare cases, replacing the PCM.
7. How much does it cost to repair a P0057 code on an Infiniti?
Repair costs vary, but replacing a downstream oxygen sensor typically costs $100-$300, including parts and labor.
8. Which oxygen sensor is affected by the P0057 code in an Infiniti?
The P0057 code refers to the Bank 2 Sensor 2, which is the downstream oxygen sensor on the side of the engine opposite Cylinder 1.
9. Can a bad oxygen sensor cause the P0057 code?
Yes, a faulty oxygen sensor is one of the most common causes of the P0057 code.
10. Will clearing the P0057 code fix the problem on my Infiniti?
Clearing the code will turn off the check engine light temporarily, but the issue will return if the underlying problem isn’t addressed.
Discuss the causes and fixes for P0057 Infiniti OBDII Code
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