AutoCodes – Generic – P0152

P0152 Code - O2 Sensor 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 indicates O2 Sensor 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 44,115

How popular is this code, among other codes? Medium

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 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 - O2 Sensor Circuit High Voltage Bank 2 Sensor 1 - AutoCodes.com — P0152 Code - O2 Sensor Circuit High Voltage Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0152?

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?

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 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 code?

Need more information on how to fix the P0152 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P0152 Audi — HO2S21 Sensor Circuit High Voltage
P0152 BMW — O2 Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 Buick — HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 Cadillac — HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 Chevrolet — HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 Chrysler — O2 sensor 2/1 Circuit High
P0152 Dodge — O2 sensor 2/1 Circuit High
P0152 Ford — O2 Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 GMC — HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 Hyundai — HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 Infiniti — Air Fuel Ratio Circuit High Bank 2 Sensor 1
P0152 Infiniti — O2 Sensor Circuit High Bank 2 Sensor 1
P0152 Jaguar — O2 Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 Jeep — O2 sensor 2/1 Circuit High
P0152 KIA — HO2S21 Circuit High Voltage
P0152 Lexus — HO2S21 Circuit High Voltage
P0152 Mazda — HO2S LF Circuit High Input
P0152 Mercedes-Benz — O2 Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 Mercury — O2 Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 MINI — O2 Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 Mitsubishi — Cylinder 2-3 Heated Oxygen Front Sensor Circuit High Voltage
P0152 Nissan — Air Fuel Ratio Circuit High Bank 2 Sensor 1
P0152 Nissan — O2 Sensor Circuit High Bank 2 Sensor 1
P0152 Pontiac — HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 Saturn — HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 Scion — HO2S21 Circuit High Voltage
P0152 Subaru — HO2S21 Circuit High Voltage
P0152 Toyota — HO2S21 Circuit High Voltage
P0152 Volkswagen — HO2S21 Sensor Circuit High Voltage

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 Code

1. What are the common symptoms of OBDII code P0152?

- Common symptoms include poor fuel economy, rough idling, engine hesitation, and the illumination of the check engine light.

2. What does the OBDII code P0152 indicate?

- OBDII code P0152 indicates that there is a high voltage condition in the O2 sensor circuit of Bank 2 Sensor 1.

3. What are the possible causes of OBDII code P0152?

- Possible causes include a faulty O2 sensor, wiring issues, exhaust leaks, a vacuum leak, or a problem with the engine's fuel system.

4. How can I diagnose the issue causing OBDII code P0152?

- Diagnosing the issue may involve using a scan tool to monitor O2 sensor data, visually inspecting the wiring, checking for exhaust leaks, and performing voltage tests.

5. Can a dirty or contaminated O2 sensor cause code P0152?

- Yes, a dirty or contaminated O2 sensor can cause false high voltage readings and trigger code P0152. Cleaning or replacing the sensor may resolve the issue.

6. What is the typical repair procedure for OBDII code P0152?

- The typical repair involves diagnosing the specific cause, which may include replacing the O2 sensor, repairing wiring, fixing exhaust leaks, or addressing other underlying issues.

7. Is it safe to continue driving with OBDII code P0152?

- It is generally not recommended to continue driving with code P0152, as it can lead to decreased fuel efficiency and potential damage to the engine over time.

8. How much does it cost to fix OBDII code P0152?

- The cost of fixing code P0152 can vary depending on the specific cause, but it may range from $100 to $300 for parts and labor.

9. Can I reset the check engine light after fixing OBDII code P0152?

- Yes, once the underlying issue causing code P0152 has been resolved, you can reset the check engine light using an OBDII scanner to clear the code.

10. How can I prevent OBDII code P0152 from recurring in the future?

- To prevent the code from recurring, it's important to perform regular maintenance on your vehicle, address any issues promptly, and ensure proper installation of components like the O2 sensor.