P0132: O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)

What Does the P0132 Code Mean?

If the powertrain control module (PCM) registers the error code P0132, this indicates that there is a problem with the O2 oxygen sensor. More specifically, if the PCM monitors that the O2 oxygen sensor voltage is above 450 millivolts for more than twenty seconds, error code P0132 will be triggered.

Speaking of O2 oxygen sensors: Their main task is to monitor the amount of oxygen in the exhaust gases when these gases pass through the combustion process. This information is necessary to ensure optimum engine performance and keep pollution to a minimum. Any problem with the O2 oxygen sensor will interfere with the performance of the vehicle and will trigger error code P0132.

P0132 Symptoms

Although error code P0132 requires serious attention, sometimes no symptoms occur when the code is triggered. However, if the problem is ignored for some time, these are some common symptoms that the driver will experience:

• Check engine light comes on
• Increased fuel consumption
• Drop in engine performance
• Problem with gear shifting
• Engine idling
• Black smoke coming out of the exhaust pipe

Possible Causes

Here are some of the possible causes which trigger the P0132 trouble code:

• Damaged O2 oxygen sensor
• Damaged mass airflow sensor
• Increased fuel pressure
• Malfunctioning engine coolant temperature sensor
• Defective PCM
• PCM needs a software update
• Defective wiring

Possible Solutions

If you are sure that the P0132 error code is present, here are some steps you can take to resolve the problem. Before replacing, we recommend that you clean and maintain the oxygen sensor and also inspect the intake manifold.

• Replace the O2 oxygen sensor
• Replace the mass airflow sensor
• Troubleshoot fuel pressure valve
• Replace the engine coolant temperature sensor
• Repair/replace the defective PCM
• Fix the broken wire connections

How to Diagnose the P0132 Code?

Attach the Car Battery Charger

It is important that the car battery charger is connected when the P0132 code is diagnosed. The car battery charger ensures that the battery charge does not run out during the diagnostic process.

It is important to keep the battery’s state of charge at an optimum level; otherwise, a low voltage can generate further error codes.

Connect the OBD2 Scanner

It is important to have the OBD2 scanner during the diagnosis of the P0132 error code. The OBD2 scanner can be used both to read and monitor the error codes and to record live data.

There are two types of OBD2 scanner: a normal code reader and an advanced scanner. The latter is expensive but offers exceptional features to correct error codes.

Check Oxygen Sensor Wiring Harness

Before replacing the oxygen sensor, visually inspect the wiring harness around the sensor. Sometimes an error code is generated due to faulty or broken cable connections, and this code will disappear if you repair the connections.

Check the O2 Oxygen Sensor Voltage

Check the output voltage at the O2 oxygen sensor with a digital voltmeter. If the sensor voltage signal is between 100 mV-900 mV (0.10 to 0.90V), it indicates that the O2 oxygen sensor is functioning properly. If the reading is outside the specified range, the sensor is defective.

Check for Ground Wiring

Many mechanics have reported that the P0132 code occurs due to poor ground wiring. If this is the case, you can check the ground voltage by connecting one end of the jumper cable to ground and another end to the negative terminal of the battery. Note the reading after connecting the jumper cable and see if the reading improves. If it does, you probably have a grounding problem.

How to Replace the O2 Oxygen Sensor

Replacing the O2 oxygen sensor can be a difficult task, but if you like to delve into the components of your vehicle, you can easily replace the O2 oxygen sensor yourself.

Step 1: Turn on the engine

It is first advisable to switch the engine on and let it run for a few minutes.

Step 2: Disconnect the Battery’s negative terminal

Turn off the engine and remove the negative battery terminal to ensure that you are protected against electric shock.

Step 3: Locate the O2 Oxygen Sensor

Then locate the O2 oxygen sensor which is located in front of the catalytic converter. It looks similar to a spark plug. If you have difficulty finding it, consult your vehicle manual.

Step 4: Remove the electrical connection

Remove the electrical connection on the oxygen sensor. You will need a screwdriver to press in the tab. Then, gently pull the connector.

Step 5: Remove the sensor

Remove the sensor by gently unscrewing it using a socket wrench.

Step 6: Install the new sensor

Install the new sensor and connect the electrical connection. Then reconnect the negative pole of the battery and start the engine. Reset the error code with the OBD2 scanner and hope it does not return.

O2 Oxygen Sensor Replacement Cost

The average cost of replacing the O2 oxygen sensor is about $250, the sensor itself costs about $117, while the labor cost is about $150. Prices may vary depending on the vehicle model and brand.

Should I Repair the P0132 Trouble Code Right Away?

Although error code P0132 does not cause a serious driveability problem, it should not be ignored for too long, as it reduces the fuel consumption of the vehicle and your vehicle will start to emit harmful pollutants.

Recommended Tools to Fix P0132 Code

• Car battery charger
• Digital multimeter to test voltage and resistance readings
• OBD2 scanner to scan the trouble code
• Electric cleaner to clean to service the dirty sensor

Further Questions?

If you have further questions about the P0132 code, please leave a comment below to explain your question. We will then help you to solve the problem immediately. Don’t forget to include details about your car model and make so that we can offer you a specific solution based on the information you provide.

Magnus Sellén

Hello I'm Magnus, the owner and the writer of this website. I have been working with cars since I was 16 and I'm specialized with in-depth Automotive diagnostics. Also been driving drifting for the last 6 years. I'm here to give you answers to all your automotive questions and I hope that you enjoy our content.