P0237 Fault Code

P0237 OBD-II Trouble Code Short Description

Turbocharger/Supercharger Boost Sensor "A" Circuit Low

What does trouble code P0237 mean?

The P0237 fault code indicates a problem with the turbocharger or supercharger boost sensor "A" circuit. This code is set when the sensor signal falls below the expected range, indicating that there may be a problem with the sensor or its wiring.

The solution to this issue depends on the cause of the problem. Some possible solutions include:

  1. Checking the wiring and connections associated with the boost sensor to make sure they are in good condition.

  2. Replacing the boost sensor if it has failed or is malfunctioning.

  3. Inspecting and cleaning the turbocharger or supercharger to ensure there are no issues with its operation.

  4. Resetting the fault code and monitoring to see if it returns, indicating a persistent problem that needs further attention.

It's important to resolve this issue promptly, as a malfunctioning boost sensor can lead to poor engine performance, reduced fuel efficiency, and other problems.

  • Generic: Turbocharger/Supercharger Boost Sensor "A" Circuit Low
  • GM: Turbocharger Boost Circuit Low Input Conditions
  • Dodge Chrysler: MAP Sensor Signal Too Low


What are the symptoms of the P0237 code?

The following symptoms may be noticed when the P0237 fault code is present in a car:

  • Check Engine Light (CEL) is ON
  • Reduced engine power
  • Poor acceleration
  • Decreased fuel economy
  • Rough idle
  • Turbocharger or supercharger not working properly
  • Possible black smoke from the exhaust
  • Possible overboost condition

It is recommended to get the vehicle diagnosed and repaired as soon as possible to avoid further damage to the engine or other components.


What causes the P0237 code?

The P0237 fault code indicates that there is an issue with the turbocharger or supercharger boost sensor "A" circuit, and it is reading a low signal. This can be caused by several factors, including:

  1. Faulty boost pressure sensor
  2. Broken or shorted wiring in the boost sensor circuit
  3. Malfunctioning turbocharger or supercharger
  4. Damaged or clogged air intake system
  5. Failed engine control module (ECM)

To fix this issue, a mechanic should perform a diagnostic scan to pinpoint the exact cause of the problem. Depending on the fault, the repair may involve replacing the boost sensor, repairing or replacing damaged wiring, repairing or replacing the turbocharger or supercharger, or repairing or replacing the ECM.

Possible Solutions

How to fix P0237?

To fix the P0237 fault code on cars, you can follow these steps:

  1. Check for damage or wear in the wiring harness of the boost sensor circuit.
  2. Inspect the boost sensor and its connector for any signs of damage or corrosion.
  3. Test the boost sensor using a multimeter to verify that it is functioning properly.
  4. Check for any vacuum leaks in the turbocharger or intercooler system.
  5. Clear the fault code using an OBD scanner and take the car for a test drive to see if the code reappears.
  6. If the fault code persists, replace the boost sensor or any damaged wiring or connectors in the boost sensor circuit.

It is always recommended to consult a certified mechanic if you are not comfortable performing these steps yourself or if the code persists even after trying these solutions.