1. Home
  2. /
  3. Complete List of OBD2...
  4. /
  5. P0237 Code – What...

P0237 Code – What Does It Mean & How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.


We’ll start by determining the DTC code, P0237. Diagnostic Trouble Codes OBD codes are standardized messages from your vehicle’s onboard computer (ECU) indicating specific problems. P0237 is a code that corresponds to the turbocharger boost sensor A circuit, indicating low voltage conditions in this circuit.


In order to identify and solve a problem, it is essential to understand the meaning of P0237. Basically, P0237 indicates that the turbocharger boost sensor is sending a signal voltage that falls below the expected range. If this voltage condition persists, the proper operation of the Turbocharger System may be disturbed, which may have an adverse effect on vehicle performance.


Let’s now examine the P0237 code’s common causes. This problem may be caused by a number of circumstances, including:

  • Faulty Boost Sensor for Turbocharger: Low voltage readings might be caused by a sensor that isn’t operating properly and sending the ECU the wrong voltage signals.
  • Wiring or Connection Issues: Damaged or corroded wiring, poor connections, or loose terminals in the turbocharger boost sensor circuit can result in low voltage signals.
  • Boost Pressure Abnormalities: When there are issues with the turbocharger itself, such as under-boosting, P0237 is triggered.


You can find the problem early if you can identify symptoms connected to the P0237 error code. Typical signs include:

  • Decreased Engine Performance: You could notice a drop in power and slow acceleration in your car.
  • Check Engine Light: As a warning, the check engine light will come on.
  • Potential turbocharger issues include: Low boost pressure may occasionally cause serious problems with the turbocharger system, such as noise or smoke.


In order for a P0237 code to be effectively resolved, an accurate diagnosis is essential. Precise identification of the problem may be made possible by a professional mechanic or diagnostic tool. They are usually testing the turbocharger’s boost sensor, electrical components, and related parts in order to determine the underlying cause of a weak voltage condition.

Common mistakes

In order to prevent wasted time and resources, there is a need to avoid frequent errors during the diagnostic and repair processes. Some common errors include not recognizing the lack of connections or misdiagnosing problems as turbocharger issues when a sensor or cable is damaged.

How serious is this?

It’s important to understand what the P0237 code means. As long as your vehicle can continue to function, neglecting it may result in diminished engine performance, decreased fuel efficiency, and possible damage to the engine. In order to maintain optimum vehicle performance, the problem needs to be resolved as soon as possible.

What repairs can fix the codeS?

repair manuals

Depending on the underlying problem, a number of repair issues can set off the P0237 code. Possible fixes might be:

  • If the turbocharger boost sensor is determined to be defective, replace it.
  • Replacing or repairing faulty connections or wiring in the sensor circuit.
  • Dealing with any turbocharger problems that could have brought in the error code.

Related codes

It feels like you’ve been getting a coded message from your vehicle’s Internal Systems when the check engine light comes on. One of these codes you’ll see is P0237, which indicates low voltage in a turbocharger boost sensor A circuit. But it can give valuable information on the health of your vehicle’s turbocharger system if you understand its related code, P0237.

  • P0238 – Turbocharger Boost Sensor A Circuit High: P0238 has a close connection to P0237 and focuses on the same turbocharger boosting sensor A circuit. Nevertheless, P0238 indicates that the circuit is subject to a high voltage condition and may have different performance issues than if it had been presented with an even lower voltage scenario of P0237.

  • P0299 – Turbocharger/Supercharger A Underboost Condition: P0299 signifies an underboost condition in the turbocharger or supercharger system. It often occurs in conjunction with P0237, because a malfunctioning sensor can give false signal of low boost and trigger both codes, although this is not directly relevant to the Boost Sensor circuit.


Finally, the P0237 DTC code indicates an issue with the boost sensor circuit in particular, indicating a low voltage signal from the turbocharger. If this code is not followed, engine performance and fuel efficiency may be adversely affected. You will be able to address this problem in an effective way and make sure that your car is operating correctly and efficiently again when you understand its meaning, the underlying causes, the symptoms, and any necessary repairs.

If you encounter the P0237 code, seeking professional assistance for diagnosis and repair is recommended to resolve the problem accurately and maintain optimal vehicle performance.

P0237 Code – What Does It Mean & How To Fix It