Everything You Need to Know About P0153 O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)

If you own a car, you know how frustrating it can be when you have a problem with it. One of the most common problems that car owners face is a check engine light.

One of the codes that are associated with this light is P0153, which refers to the O2 sensor circuit high voltage (Bank 2 Sensor 1). In this article, we will be talking about everything you need to know about P0153 and its causes.


The oxygen sensor (O2 sensor) is an essential component of your car’s emission control system. It measures the amount of oxygen in the exhaust gases and sends that information to the engine control module (ECM). The ECM then adjusts the air-fuel mixture to maintain the proper air-fuel ratio. If the O2 sensor is not working correctly, it can cause a variety of problems, including reduced fuel economy, increased emissions, and decreased performance.

What is P0153?

P0153 is a diagnostic trouble code (DTC) that indicates an issue with the O2 sensor circuit high voltage (Bank 2 Sensor 1). In simpler terms, it means that the O2 sensor is not reporting the correct voltage to the ECM. The ECM expects to see a certain voltage range from the O2 sensor, and if it detects a voltage outside that range, it will trigger the P0153 code.

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Causes of P0153

There are several potential causes of P0153, including:

  1. Faulty O2 sensor: The most common cause of P0153 is a faulty O2 sensor. Over time, the sensor can become contaminated with carbon deposits or fail due to wear and tear.
  2. Wiring issues: Wiring problems can also cause P0153. The wires connecting the O2 sensor to the ECM can become damaged or corroded, preventing the sensor from sending the correct signal.
  3. Exhaust leaks: Exhaust leaks can also cause P0153. If there is a leak in the exhaust system, it can allow oxygen to enter the system downstream of the O2 sensor, causing it to report a high voltage.
  4. Vacuum leaks: A vacuum leak can also cause P0153. If there is a leak in the intake manifold or vacuum lines, it can cause the engine to run lean, which can cause the O2 sensor to read a high voltage.

Symptoms of P0153

The symptoms of P0153 can vary depending on the severity of the problem. Some of the most common symptoms include:

  1. Check engine light: The most obvious symptom of P0153 is a check engine light. This light will illuminate on your dashboard when the ECM detects a problem with the O2 sensor.
  2. Poor fuel economy: A faulty O2 sensor can cause your car to use more fuel than necessary, resulting in poor fuel economy.
  3. Rough idle: If the O2 sensor is reporting a high voltage, it can cause the engine to run lean, resulting in a rough idle.
  4. Decreased performance: A faulty O2 sensor can also cause decreased performance, as the ECM may not be able to adjust the air-fuel mixture correctly.

How to diagnose P0153

Diagnosing P0153 can be challenging, as there are several potential causes. To diagnose the problem, you will need a scan tool that can read DTCs and a multimeter to test the O2 sensor’s voltage. Here are the steps to diagnose P0153:

  1. Connect the scan tool to the OBD-II port and read the DTC.
  2. Check the freeze frame data to see what conditions caused the code to set.
  3. Use the multimeter to test the voltage output of the O2 sensor.
  4. Check the wiring and connectors for damage or corrosion.
  5. Inspect the exhaust system for leaks.
  6. Check the vacuum lines and intake manifold for leaks.


P0153 is a common problem that can occur in any car. It is essential to diagnose and fix the problem to prevent further damage to your car and reduce emissions. If you are experiencing any of the symptoms of P0153, take your car to a mechanic to diagnose and fix the problem. Remember, a properly functioning O2 sensor is essential to keeping your car running smoothly and efficiently.


  1. What happens if you ignore the P0153 code?

    Ignoring the P0153 code can lead to reduced fuel economy, increased emissions, decreased performance, and potential engine damage.

  2. Can I drive my car with a P0153 code?

    While it is possible to drive your car with a P0153 code, it is not recommended. It can cause damage to your engine and increase emissions.

  3. How much does it cost to fix a P0153 code?

    The cost to fix a P0153 code can vary depending on the cause and the make and model of your car. On average, it can cost between $100 and $400.

  4. How often should I replace my O2 sensor?

    O2 sensors can last up to 100,000 miles, but it is recommended to replace them every 60,000 miles to maintain optimal performance.

  5. Can a bad O2 sensor cause a misfire?

    Yes, a bad O2 sensor can cause a misfire, as it can cause the ECM to adjust the air-fuel mixture incorrectly.