Code Definition

P023E — MAP turbocharger/ supercharger boost pressure sensor mismatch - Bank 1 - sensor 2

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

About P023E

P023E 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 P023E is stored, the module has detected a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine; 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 P023E 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 P023E fault code is set when the Engine Control Module (ECM) detects a mismatch in the readings between the Manifold Absolute Pressure (MAP) sensor and the boost pressure sensor for the turbocharger or supercharger on Bank 1, specifically for Sensor 2. This indicates that the two sensors are providing significantly different readings regarding the boost pressure, which can affect the engine's performance. The ECM relies on these sensors to adjust fuel delivery and ignition timing based on the engine's boost pressure.

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