Code Definition

P00B5 — Radiator Temperature Sensor Signal Intermittent

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

About P00B5

P00B5 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 P00B5 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 P00B5 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 fault code P00B5 is triggered when the Engine Control Module (ECM) detects an intermittent signal from the radiator temperature sensor. This intermittent signal indicates that the sensor's output is irregular or inconsistent, potentially due to loose connections, corroded terminals, intermittent short circuits, or a failing sensor. An intermittent signal can cause the ECM to receive sporadic temperature readings, leading to challenges in effectively managing the engine's cooling system. This erratic behaviour can result in inadequate cooling or unnecessary engine cooling, affecting engine ...

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