Code Definition

P0119 — Engine Coolant Temperature Circuit Intermittent

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

About P0119

P0119 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 P0119 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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 P0119 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 P0119 code signifies an intermittent signal in the circuit of the Engine Coolant Temperature (ECT) sensor. This sensor is vital for measuring the temperature of the engine's coolant, providing critical information to the Engine Control Module (ECM) for effective engine management. An intermittent signal can lead to inconsistent readings, affecting the ECM's ability to regulate fuel injection, ignition timing, and emissions control.

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