Code Definition

P023C — Intercooler coolant pump Circuit High

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

About P023C

P023C 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 P023C is stored, the module has detected a signal or supply voltage higher than the expected operating range.

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 P023C 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 P023C fault code is set when the engine control module (ECM) detects a higher than normal voltage in the circuit of the intercooler coolant pump. This typically indicates an electrical fault, such as a short to power within the circuit. High voltage in this circuit can lead to the malfunctioning of the coolant pump, which in turn can impact its ability to effectively circulate coolant through the intercooler system. This is particularly important in turbocharged engines, where effective cooling is crucial for optimal engine performance.

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