Code Definition

P0237 — Turbocharger Boost Sensor A Circuit Low

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0237

P0237 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0237 is stored, the module has detected a signal or supply voltage lower than the expected operating range; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0237 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0237 fault code is set when the Engine Control Module (ECM) detects a lower than expected input signal from the Turbocharger Boost Sensor A. This sensor, commonly referred to as the boost pressure sensor, measures the amount of pressure or boost generated by the turbocharger and relays this information to the ECM. A low input signal from this sensor may indicate an electrical problem in the sensor circuit, such as a short to ground, a faulty sensor, or issues with the wiring or connectors. This condition can lead to incorrect boost pressure readings, potentially causing engine performance...

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