Code Definition

P0195 — Engine Oil Temperature Sensor Malfunction

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

About P0195

P0195 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 P0195 is stored, the module has detected 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 P0195 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 P0195 fault code is set when the Engine Control Module (ECM) detects a malfunction in the engine oil temperature sensor. This sensor measures the temperature of the engine oil, providing critical data to the ECM for optimal engine management. The engine oil temperature can affect the viscosity of the oil and, consequently, the lubrication of engine components. Proper functioning of this sensor is crucial for engine protection, efficiency, and performance. A malfunction could be due to a faulty sensor, issues with the wiring or connectors, or an ECM problem. If the ECM cannot accurately det...

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