P2227 Chevy Cruze – Definition, Symptoms, Causes, and Troubleshooting

The DTC (Diagnose Trouble Code) P2227 refers to the malfunction of the engine’s Barometric Sensor. It also means that the engine’s control unit (ECU) and mass air flow sensor (MAF) might have malfunctioned, like the manifold absolute pressure sensor or throttle position sensor may not correlate. 

You have diagnosed the P2227 DTC code on your Chevy Cruze, and now you’re clueless? Are you unsure as to what this service code means? I can help!

Let’s discuss this DTC code in-depth, including its symptoms, causes, diagnosis methods, and troubleshooting procedures.

What Does the Code P2227 Mean?

The P2227 code is a Diagnostic Trouble Code (DTC) that indicates a malfunction in the Barometric Sensor (BAP). This P2227 problem in your Chevy Cruze can cause a variety of symptoms and causes. 

Let’s glimpse all the symptoms, causes, and quick fixes. I’ll gradually move toward a detailed discussion of the troubleshooting procedures. 

P2227 Chevy Cruze Malfunction: Quick Overview

SymptomsCausesPossible Fixes
Reduced Engine PerformanceDamaged BAP Sensor Repair/Replace the BAP sensor
Reduced Fuel EconomyDamage Engine Control Unit (ECU)Repair/Replace the ECU/TPS/MAF sensors if needed
Engine MisfiringFaulty WiringReplace damaged or burned wires
Weird Engine NoisesHeat DamageIf clogged, clean the sensors
Bad odor from fuelFaulty MAF SensorUpdate the ECU software
Reduced throttle responseFaulty MAF SensorKeep up to date ECU software

Now, let’s move on to the symptoms and causes of the DTC code P2227.

What are the Symptoms of the Code P2227?

You’ll encounter six primary symptoms if the P2227 malfunctions. These are as follows.

Symptom 1: Reduced Engine Performance and Power

The first symptoms you’ll encounter are reduced engine performance and low power. The engine will appear weaker due to the failure of the Barometric Air Pressure system. It happens when the barometer fails to provide the required boost to the engine.

Symptom 2: Reduced Fuel Economy

When the barometer malfunctions it will be unable to flow air to the engine chambers. The engine burns more fuel in the combustion chamber to compensate for the lack of air. As a result, fuel consumption increases, reducing the engine’s fuel economy.

Symptom 3: Engine Misfiring

During the combustion process, the air and fuel do not mix properly because of the barometer malfunction. The engine’s power is maximized when air is mixed with fuel. Any issues related to the BAP sensor and the spark plug will result in a misfire. (1)

Symptom 4: Abnormal Engine Noises

Another symptom is that you’ll encounter abnormal engine noises. Typically, it occurs when there is more air intake than fuel intake. The fuel won’t burn faster when there is less fuel and more air. As a result, abnormal noises come from the engine.

Symptom 5: Bad Fuel Odor

Another symptom of the P2227 DTC error code is a bad smell from the fuel. If the barometer sensor of your car fails to burn the fuel properly. In this case, unburned fuel will escape through your exhaust pipe, causing a fire and bad odor. (2)

Symptom 6: Reduced Throttle Responsiveness

When the BAP sensor fails to work properly, the air pressure decreases in the engine chamber. As a result, the engine provides a slow throttle response during acceleration.

What are the Causes of the Code P2227?

There are several causes of the P2227 code. The causes are as follows.

Cause 1: Damaged BAP

The P2227 code means the barometric air pressure sensor of the engine is defective or damaged. The code appears when there is no communication between the BAP sensor and the Engine Control Unit (ECU). The malfunction can occur due to many reasons.

If the sensor is overheated or if there is any corrosion or it located in the wrong place can be the reason for malfunction. The problem needs to be diagnosed immediately.

Cause 2: Damaged ECU

Another cause of the P227 malfunction is having a damaged ECU (Engine Control Unit). The injector controls many components, such as the timing of the ignition sensor and crankshaft motion sensor. When the ECU malfunction, it fails to control the components.

Cause 4: Faulty Wiring

Burned or damaged internal wiring will cause the P2227 to appear. Also, it disconnects the BAP sensor from the engine as well as the ECU. In this case, the sensors will not be able to assist the engine in performing properly.

Cause 5: Heat Damage

It’s the least common cause of P2227, as other sensors can easily detect overheating in the engine. The engine can overheat due to a lack of proper airflow, lubrication, and increased friction. As a result of excessive heat, the cylinder head can get warped, resulting in oil leaks and poor performance. 

Cause 6: Faulty MAF Sensor

Mass Air Flow sensor, or MAF, controls the airflow into the engine’s combustion chamber. ECUs are affected when the MAF sensor malfunctions, resulting in improper air and fuel mixtures. The P2227 or P1101 code will appear, indicating the malfunction.

How to Troubleshoot the P2227 Code? Complete Guide

Now, I’ll explain the troubleshooting methods with a step-by-step procedure.

Step 1: Locate the BAP Sensor And Diagnose

Start by locating the Barometric Air Pressure sensor on your vehicle. Your vehicle’s BAP sensor location may vary depending on its model and brand. If you’ve found the sensor, check for physical damage to it and its surrounding area, like a heated area, debris, etc.

Step 2: Ensure Proper Connection

Ensure the connectors are properly connected with all the major sensors. It’s possible for the sensors near the engine to loosen up or get damaged. Also, make sure you inspect the wires properly for any kind of visible damage or leaks.


Always ensure you’ve disconnected the car’s battery from all the sensors. The device’s internals may be damaged if you do not disconnect the sensors during the procedure. Be cautious and hire an expert if you’re unsure of the procedure.

Step 3: Adjust the Sensors 

The third step is to inspect all the other sensors to see whether any issue needs your attention. Disconnect the sensors from the connector to reveal the pin. Now, you can use a multimeter device to check the condition of the sensors.  

Follow the owner handbook that comes with the vehicle to know the default values. Any discrepancy in the value indicates an issue that needs to be fixed immediately.

Step 4: Ensure There’s No Obstruction

Another important step is to ensure the sensors are positioned correctly and are not obstructed by other parts. The sensors could deliver incorrect readings if they are obstructed. In addition, it may cause sensors to result in poor engine performance.

Step 5: Update the ECU Software

The last step of troubleshooting the P2227 malfunction is updating the ECU software. You need to consider some things before updating your car’s ECU.

  • The ECU tune-up should cost between $400 – $1400. If you get the help of a technician, the labor cost would be $100-$200. 
  • Updating/modifying the ECU is completely legal and allowed by the US government. Try not to violate any laws by the Department of Transport.
  • During the ECU update process, you won’t be able to use the vehicle.

Consider watching this video to proceed with the ECU update procedure. (4)

How to Diagnose the P2227 Code? Complete Video Guide

Now, let’s discuss how you can diagnose this P2227 code on your own without the help of any technicians. Diagnose the crucial sensor behind the malfunction (3). Start by inspecting the BAP sensor and MAF sensor, followed by the TSP sensor.

Many people make the mistake of replacing the BAP sensor without inspecting the MAP and TSP sensors. So, make sure you primarily start your inspection with the BAP sensor. Then gradually inspect the other sensor for possible malfunction. 

Since the P2227 is primarily related to the BAP sensor, start by replacing it. Here’s how you can replace the BAP sensor of your chevy cruze. Note that the procedure is the same for both P2227/P2228 codes so don’t get confused between them.

Now move on to inspecting the MAF sensor inspection and replacement. 

These major engine sensors are the main source of the P2227 malfunction. If the code appears, you need an immediate fix and replacement if required. If the above steps shown in the video are confusing, consider hiring an expert.

Note: You can also use an OBD II scanner to diagnose and confirm the P2227 malfunction.

How Much Does Sensor Replacement Cost?

Do you want to know the cost of replacing the sensors? Take a look at the table below. Remember that the prices may vary depending on the different brands available in the market. So, the below table shows the different price ranges.

SensorsPrice Ranges
Barometric Pressure Sensor (BAP)$20 – $80
Mass Air Flow Sensor (MAF)$20 – $180
Throttle Position Sensor (TSP)$12 – $65
Camshaft Positioning Sensor (CPS)$15 – $30

Can You Drive with the P2227 Code?

NO, you should not drive with the P2227 code. It’s not recommended to drive with this code to prevent engine damage. This code is of medium severity, but your car should be serviced and repaired as soon as possible.

Symptoms Code P2227 Infographic


How Severe Is the P2227 DTC Code?

The severity of the P2227 is moderately high since it happens when the BAP sensor malfunctions. It’s one of the major sensors that ensure optimal engine performance. Hence, if your technician has diagnosed the code, consider servicing the car asap.

Where’s the BAP located In a Chevy Cruze?

The barometric pressure sensor, or BAP, should be located behind and on the intake manifold. The intake manifold is located below the throttle body. The sensor is located at the right end of the intake manifold and doesn’t go with it.


The P2227 Chevy Cruze code means your Chevy Cruze needs immediate attention and servicing. Other DTC codes allow you to continue driving for a while. Nevertheless, avoiding this malfunction may lead to further damage and costly repairs.

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William Baldwin

This Is William Baldwin, The Founder & Managing Editor of this website. Me and my team share automotive tips, tricks, and news

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Talha Atta

Talha Atta, a Mechanical Engineer and experienced technical content writer and editor at Autoglobes.com with a passion for the automotive industry.