P0237 Code: Turbocharger / Supercharger Boost Sensor “A” Circuit Low

On-board diagnostic (OBD) codes help mechanics and vehicle owners identify possible issues in a vehicle. But before you can resolve these problems, it’s important to know what these codes mean.

Code P0237 is one of many trouble codes that can be logged and retrieved from the OBD system. Here is some information to help you understand what getting this code can mean for your vehicle.

What Does the P0237 Code Mean?

Diagnostic trouble code (DTC) P0237 stands for “Turbocharger/Supercharger Boost Sensor “A” Circuit Low.” This code is logged when the powertrain control module (PCM) detects an incorrect signal from the boost pressure sensor.

The PCM closely observes boost pressure with a sensor called the manifold absolute pressure sensor (MAP). The boost pressure sensor tells the PCM how much boost is actually being created by the turbocharger.

When boost pressure is high the voltage signal is high. When boost pressure is low the voltage is low. The PCM uses the boost control solenoid to control the amount of boost pressure that is produced by the turbocharger while simultaneously using the boost pressure sensor to verify that the boost pressure is correct.

Error code P0237 sets when the PCM detects a low voltage signal indicating low boost pressure when a high pressure command has been sent to the boost control solenoid “A.”

Depending on the severity of the problem, related error codes might also be stored with this DTC. Code P0237 is similar to error codes P0235 and P0236.

Note: The definition of code P0237 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0237 Code?

• Faulty boost sensor “A”
• Faulty turbocharger
• Exhaust leak
• PCM failure
• Wiring issue

What are the Common Symptoms of the P0237 Code?

• Illuminated check engine light
• Poor engine performance
• Excessive fuel consumption
• Lack of boost from the turbo/supercharger

How to Diagnose the P0237 Code

Different makes and models can set the error code P0237. But this does not mean that there is a one-size-fits-all approach to diagnosing its underlying cause. The steps for troubleshooting this code will vary depending on your vehicle.

Check out the video below to get an idea of what the diagnostic process for this code might involve:

How to Fix the P0237 Code

Code P0237 shares similar triggers and symptoms with other engine codes. However, the appropriate diagnostic and repair procedure will depend on the specifications of your vehicle. So if you’re unfamiliar with auto repair, it’s best to leave the job to a mechanic.

If you’re considering troubleshooting this code on your own, it’s a good idea to refresh your automotive knowledge before attempting any fixes. Consult a vehicle-specific repair manual or an online repair database to learn the appropriate diagnostic procedures for this code.

Fix the P0237 Code With a New Boost Sensor

A triggered P0237 code can result in poor engine performance and excessive fuel consumption. These issues might seem minor, but it can result in a lot of wasted fuel in the long run. As much as possible, you should always try to keep your engine running efficiently. Over time, excessive fuel consumption can be expensive. Luckily, getting replacement parts like boost sensors is easy and convenient here at CarParts.com.

Searching for the right parts like sensors at CarParts.com is easy because of our vehicle selector. Once you’ve entered your vehicle’s year, make, and model, you’ll be able to see a list of compatible parts. Still unsure about compatibility? Our friendly customer service representatives will be more than happy to answer all your queries.

Enjoy our low prices and fast shipping when you shop for boost pressure sensors at CarParts.com today!