What is OBD-II Code P2AE5 – Intake Air O2 Sensor Pumping Current Circuit High Bank 1

What is OBD-II Code P2AE5 – Intake Air O2 Sensor Pumping Current Circuit High Bank 1

As a mechanic, I have come across several OBD-II codes, and one of the codes that can be quite confusing for drivers is P2AE5. If you have ever had a check engine light turn on, then you know how frustrating it can be to not have a clear understanding of what is causing the problem. In this article, we will be discussing OBD-II Code P2AE5 – Intake Air O2 Sensor Pumping Current Circuit High Bank 1. We will explain what the code means, common symptoms, and how to repair the issue.

What is OBD-II Code P2AE5?

OBD-II Code P2AE5 indicates that there is an issue with the intake air O2 sensor pumping current circuit on bank 1. The O2 sensor is responsible for measuring the oxygen levels in the air and fuel mixture that goes into the engine. This information helps the vehicle’s computer make adjustments to optimize the engine’s performance and reduce emissions. The pumping current circuit in the O2 sensor helps to stabilize the sensor’s output signal.

When there is a problem with the pumping current circuit, it can cause the O2 sensor to misread information, leading to poor engine performance. The high bank 1 refers to the bank of cylinders that contains cylinder 1. In most vehicles, the bank 1 sensor is located upstream of the catalytic converter.

Symptoms of OBD-II Code P2AE5

If the check engine light turns on and OBD-II Code P2AE5 is the reason for it, the driver may experience some symptoms. These include:

1. Decrease in fuel efficiency – when the O2 sensor is not functioning properly, it can cause the engine to use more fuel than it should.

2. Poor engine performance – the car may not accelerate well, may stall or is difficult to start.

3. Rough idling and engine hesitation – if the engine is not able to properly adjust to the air/fuel mixture, it may cause rough idling or hesitation while driving.

4. Increased emissions – a faulty O2 sensor can cause an increase in emissions, which can lead to a failed emissions test.

5. Reduced horsepower – the engine may not reach its full power output potential, and you may notice a decrease in the vehicle’s overall horsepower.

How to repair OBD-II Code P2AE5

As a mechanic, when I encounter any OBD-II code, I recommend performing a diagnostic test to identify the root of the problem. This test will help to verify the code, identify the faulty part and determine the best way to repair the issue.

For code P2AE5, some common causes of the problem include a faulty intake air O2 sensor or a damaged wiring harness. I recommend that you begin by inspecting the wiring harness to see if there were any physical damages present like broken wires or damaged connectors. If no physical damage is found, the next step is to test the sensor using a multimeter to check for an open circuit or short to the ground. If the test reveals that the sensor is faulty, it needs to be replaced.

In some cases, the problem may also be resolved by cleaning the sensor using an electronic cleaner. Once the replacement sensor is installed, the O2 sensor should be reset using an OBD-II scanner. This will clear the code and reset the car’s computer, enabling it to make new adjustments to optimize the engine’s performance.


1. Is it safe to drive when P2AE5 code turns on the check engine light?

It’s usually safe to drive with P2AE5 code when the symptoms are mild or don’t affect the vehicle’s safety. However, I recommend you to seek a mechanic’s help as soon as possible to get the issue resolved and avoid further damage to the engine.

2. Can I drive with a faulty O2 sensor?

While you can drive with a faulty O2 sensor, it’s not recommended to do so. A damaged or faulty O2 sensor can lead to poor fuel economy, increased emissions, rough idling, reduced horsepower, and engine problems. In some states, it’s also illegal to drive without a properly functioning O2 sensor.

3. How much does it cost to replace an O2 sensor?

The cost of replacing an O2 sensor can vary depending on the type of sensor you need, your car’s make and model, and the auto shop you go to. The average cost of replacing a single O2 sensor ranges between $200 and $500, including labor costs. Some sensors are more expensive than others, so make sure to ask for an estimate before proceeding with the repair.

4. How long does it take to replace an O2 sensor?

Replacing an O2 sensor usually takes around 1 to 2 hours, depending on the accessibility of the sensor, your car model and make, and the mechanic’s experience. Keep in mind that replacing an O2 sensor may take longer under some circumstances, such as if the sensor is located in a difficult to reach area.

5. How often should I replace my O2 sensor?

O2 sensors usually last for around 100,000 miles to 150,000 miles or more. However, their lifespan can be affected by various factors like driving conditions, the quality of fuel you use, and how well you maintain your vehicle. It’s recommended to check your vehicle manual to determine how often your O2 sensor should be replaced.


In conclusion, P2AE5 is an OBD-II code that indicates a problem with the intake air O2 sensor pumping current circuit on the bank 1 side of the engine. Its symptoms include reduced fuel efficiency, poor engine performance, increased emissions, and reduced horsepower. To repair it, I would recommend performing a diagnostic test to identify the faulty part, including inspecting the wiring harness and testing the sensor using a multimeter. Replacing the faulty sensor and resetting the O2 sensor should help resolve the issue. It’s important to get the problem resolved quickly to avoid further damage to the engine.

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