Code Definition

P1184 — Engine Oil Temperature Out Of Self Test Range

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Generic

About P1184

P1184 is a manufacturer-specific powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1184 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

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.

P1184 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Engine Control Module (ECM) performs a self-test of the engine oil temperature (EOT) signal during key-on or initial engine start by comparing the sensor value against a calibrated expected range, typically based on ambient temperature and other temperature inputs. DTC P1184 is set when the oil temperature signal is outside the allowable self-test limits, indicating the sensor output is implausibly high or low before normal engine heat influence, suggesting a biased sensor signal or electrical fault.

Quick Facts