How to Troubleshoot & Fix P0132 Jeep DTC Code? (Ultimate Guide)

You might not want to encounter anything as destructive as an illuminated check engine light or a bad diagnostic trouble code. However, countless drivers annually must at some point endure this situation.

If you have clawed your disappointment back into your chest with the P0132 Jeep code, it’s time to set your mind to making it disappear. Keep reading to find out more!

What Does P0132 Jeep Code Mean?

P0132 is a diagnostic trouble code for the O2 sensor circuit High voltage at Bank 1 sensor 1 on your Jeep. 

It indicates that the Powertrain Control Module (PCM) has detected excessively high voltage from the Bank 1 sensor 1 oxygen sensor circuit. 

  • P = Powertrain Control Module
  • 0 = Standardized Number 
  • 1 = Fuel and Airflow Monitoring
  • 32 = High voltage on Oxygen sensor circuit (Bank 1 Sensor 1)

The O2 sensor’s main purpose is to assess whether your Jeep’s exhaust system has any unburned gasoline. This information is necessary to guarantee optimal performance and maintain environmentally sound operations. 

Generally, the heated oxygen sensor 1 (upstream) has a ceramic zirconia tube. Through this voltage is created of around 1 V with increasing concentrations of oxygen to 0 V in the presence of lower levels of oxygen. 

When the voltage crosses this limit and stays for too long, the PCM detects it and stores P0132 Jeep code. 

P0132 Code: What Causes Upstream Oxygen Sensor Circuit High Voltage on Jeep?

The reasons behind the Jeep fault code P0123 are primarily related to how your Oxygen sensors are functioning.

This probably indicates the O2 sensors are defective. However, there are numerous explanations for the code’s presence in your situation.

These may include:

  1. Faulty Oxygen Sensor Bank 1
  2. Damaged wiring harness or bad electrical connection
  3. Faulty fuel injectors 
  4. Inappropriate fuel pressure 
  5. Faulty air-fuel ratio sensor
  6. Exhaust gas leaks
  7. Defective PCM (Rare)

Read Also: How to Troubleshoot and Fix U1120 Jeep DTC Code?

How to Troubleshoot & Fix P0132 Jeep Code?

You might hear some mechanics tell you that you simply need to swap out an oxygen sensor to fix the error code P0132 in your Jeep. 

However, we genuinely think that you should look at testing a lot more elements before you dismiss one component as a cause of the issue. 

That is the reason why we structured an extensive troubleshooting procedure to resolve the problem. Let’s jump into the main process.

1. Preliminary Works

You will need to use an OBD II scanner first. Using the scanning device allows you to take readings from various sensors, which you can then use to analyze what exactly is going wrong. 

Take notes of the readings for the oxygen sensor, the mass airflow sensor, the air-fuel ratio sensor, and the engine coolant temperature sensor. 

This will help you to figure out exactly which sensor is giving out the wrong measurements.

You should have a decent knowledge of specified readings for your Jeep model. If your readings aren’t within the acceptable margin, that may be the cause. 

Check whether the fuel pressure for your vehicle is exceptionally high. Don’t forget to monitor your Jeep’s fuel pressure.

If it’s climbing too high, this could indicate an issue in the system, maybe it’s a damaged fuel line, internal blockage, or a malfunctioning fuel injector.

Read Also: How to Troubleshoot and Fix the P0457 Jeep DTC Code?

2. Visually Inspect Wiring Harness and Terminals

It’s commonly recommended that you check the vehicle’s oxygen sensor for the P0132 error code first. 

But if you discover that it’s operating in excellent shape, inspect your wiring harness and other electrical connections first.

It’s quite likely that the cables connecting the PCM to the O2 sensor will be damaged or cracked. If this happens, the transmission of the signal will be impeded.

This, in turn, will impair communication with the O2 sensor and cause the PCM to fail to calculate accurate fuel statistics. 

Put simply, PCM erroneously monitors the fuel-air mixture, thereby triggering the P0132 code to show up. 

For this reason, examine the wiring and connectors to make sure that no corrosion damage is present. 

3. Inspect the Oxygen Sensor

After the basic check, check out the sensor. As we mentioned, the most typical source of a P0123 Code is a failure or damaged O2 sensor. 

In general, this sensor may last 60,000 to 90,000 miles, However, it might go bad sooner due to the accumulation of road grime, harsh weather conditions, or other factors. 

This oxygen sensor (Bank 1 Sensor 1) is located right before the catalytic converter. One is on the side with cylinder number One. Sensor number one is usually the one in the exhaust manifold. 

Visually check the oxygen sensors, electrical connections, wire harnesses, and metal tabs for any damages. 

If damages are found, then replace the oxygen sensor. So here are two of the most practical solutions to fix the PO 132 error code. 

After the repair, you can now use an OBD II scanner to clear the error code and tap the rescan button one more time to make sure everything is fine with your vehicle.

Read Also: How to Troubleshoot and Fix the P1491 Jeep DTC Code?

4. Check for Leaks in Fuel Injectors

Leaking fuel injectors are also responsible for triggering the error code P0132 since it makes the fuel-air mixture too rich. So, if the code P0132 reappears, it’s better to check the fuel injectors. 

Generally, the fuel injectors are mounted in the intake manifold so that they spray fuel directly at the intake valves. 

Inspect whether the fuel injectors are leaking on the fuel rail. For this, you have to carefully remove the fuel injector. Make sure the new injector has new seals and never use the old seals over. 

When you change the fuel injectors, change them all as a set, otherwise, the engine will run unevenly. 

In order to prevent leaking, get some gasoline, put it in a cup, and then dip the new fuel injector into it, so the seals may get wet with gasoline and it will go in and won’t leak. After all, just slide all the new fuel injectors in. 

5. Have a Look at Your Powertrain Control Module (PCM)

If everything seems in order, the issue could possibly be with the PCM in your Jeep. It might just be a software glitch, so most likely you’ll have to take it right into a dealership to correct it. 

However, there are relatively rare instances that your PCM will have to be replaced entirely. 

Regardless of what, a piece of the trade will still need to be done to ensure that it’s working correctly. 

A mechanic will still need to configure it for your car, so it’s in your interest to take it to them and see what they have to say.

Read Also: How to Troubleshoot P1281 Jeep Grand Cherokee DTC Code?


Would you like to learn more about the cause of the P0132 Jeep trouble code? Perhaps this short FAQ section will match your curiosity. Check out a list of frequently asked questions below.

Can you drive a Jeep with P0132 code?

Most of the time, a P0132 infraction will not prevent one from driving. However, the car’s performance will likely be adversely affected, and a lot more fuel will be burned than expected. Besides, more pollutants will be released into the air.

How much does it cost to fix Jeep P0132 code?

Simply put, the cost of fixing the p0132 error code depends on the cause. For example, the O2 sensor for your Jeep can cost anywhere from $25 to $100. Considering the labor cost, to get rid of the P0132 code, you might need to shell out about 100 to $1250.

Is the oxygen sensor repairable?

We can say repairing an O2 is impossible because of its construction, technology, and mechanism of working. Yeah, sometimes cleaning the sensor may add some miles to its service life. it is a good idea that you replace the O2 sensor.

Final Words

Occasionally a P0132 Jeep code may not be an issue, and other times it can be an indicator that a much larger issue will soon be developed. 

For that reason, we always highly recommend getting your code P0132 fixed as soon as possible. 

No worries, Parts you may need to swap to fix P0123 are fairly reasonable and the repairs are simple for a beginner too.

Read Also: How to Troubleshoot & Fix C148f-1D Jeep DTC Code? (Ultimate Guide)

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