OBD-II Trouble Codes

P0132: Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 1)

Reading Time: 4 minutes

Decreased fuel efficiency, a rough-running engine, and an illuminated check engine light can point to a lot of issues. However, if your OBD-II scanner stores the P0132 code, there is a problem related to one of your oxygen sensors.

In this article, we discuss what code P0132 means, as well as its symptoms and causes.

What Does the P0132 Code Mean?

Diagnostic trouble code (DTC) P0132 stands for “Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 1).” It involves the vehicle’s oxygen sensor, specifically the #1 sensor on Bank 1. This code is triggered when the PCM or powertrain control module detects that your heated oxygen sensor reading is too high.

This can indicate that the oxygen sensor is responding too slowly to the air-fuel mixture in your engine.

replacement oxygen sensor
Code P0132 is triggered when the PCM detects that your heated oxygen sensor reading is too high.

This happens when the oxygen sensor voltage stays above a certain threshold for a select amount of time. The code is also triggered if the air-fuel ratio stayed in a rich-biased condition for too long.

Take note that what’s considered as “too long” varies depending on your vehicle’s make and model.

What Do Oxygen Sensors Do?

The primary purpose of oxygen sensors is to check the amount of unburned oxygen in your vehicle’s exhaust stream as it exits the engine. They are located within your vehicle’s exhaust system.

Oxygen sensors track the amount of oxygen in the air that’s entering and leaving the catalytic converter. They then send data to the PCM.

Information regarding the engine’s air-fuel mixture helps the PCM determine the right amount of fuel needed to run your vehicle.

For example, if your oxygen sensor detects that the oxygen level in your exhaust is low, this means that the engine is using excessive fuel and running too rich. The PCM should adjust the amount of fuel to be injected in the engine accordingly. If this issue remains undetected, the wasted fuel may lead to reduced fuel economy, engine performance problems, and increased toxic emissions.

In order for this process to run as smoothly as possible, your O2 sensors should be in good condition at all times.

What are the Possible Causes of the P0132 Code?

OBD-II code P0132 may be triggered by a number of causes, which may vary depending on your vehicle’s make and model. Here are the common triggers of code P0132:

woman driving a car
If your engine is not running as smoothly as before and you’re experiencing rough idling, there may be something wrong with your car’s oxygen sensors.

What are the Common Symptoms of the P0132 Code?

Symptoms related to code P0132 may vary depending on your vehicle’s make and model. Aside from a bad smell or black smoke coming out of the exhaust, here are the other common symptoms related to the P0132 code:

Rough Running Engine

This is the most noticeable symptom related to code P0132. If your engine is not running as smoothly as before and you’re also experiencing rough idling, there is a chance that something is wrong with your oxygen sensors.

Decreased Fuel Efficiency

Since your oxygen sensors play a vital role in fuel injection, any issues may increase your fuel consumption. If you notice that your vehicle is consuming more fuel than usual, it is best to have your vehicle checked.

Illuminated Check Engine Light

An activated check engine light is a clear indication that something is wrong with your engine. Once it illuminates, it is best to have your vehicle checked immediately.

How to Diagnose the P0132 Code

Many problems can trigger a P0132 code, from a bad oxygen sensor to a defective mass airflow sensor. Unless you’re an automotive specialist, you may have a hard time determining its underlying cause.

Let your trusted mechanic diagnose the issue if you are not confident with your automotive know-how. However, if you’d prefer to try your hand at diagnosing your P0132 code, watch the video below to get an idea of the troubleshooting process:

How to Fix the P0132 Code

Like most OBD-II codes, there is no one way to resolve the P0132 code. The right fix varies based on what triggered the code and the vehicle’s make and model. This means that the solution to a P0132 code in a Honda Civic may not work as well for a Dodge Durango.

If you are confident with your automotive aptitude, identify the cause of the P0132 code using the video above. Once you’ve accurately diagnosed the issue, you can figure out how to resolve it by doing your research on the steps others with the same vehicle have taken in order to clear the P0132 code.

You can also make use of online auto repair resources and guides—and don’t forget to check your owner’s manual before implementing any solutions.

Also, consider securing an ALLDATA single-vehicle subscription to prepare for any future issues that your vehicle may experience. It provides in-depth and up-to-date factory repair information for DIYers.

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