I own Isuzu Rodeo 2004 3.2 V6. I connected an OBD device and I noticed that the engine temp is around 72~C, the gauge on the dashboard looks fine (seats on the center where is suppose to be).

  • I check the thermostat and it's not stuck.
  • I couldn't find anywhere the what should be engine operating temperature in this vehicle
  • what could be the problem here?

1 Answer 1


Typically, engine operating temperature is around 90 degrees Celsius. However, there may be several temperature sensors, each of which can read the temperature at a different location. Most likely, the gauge is using a different temperature sensor than the ECU is using. Different locations may have different temperatures.

Several possibilities:

  • The ECU temperature sensor is reading the temperature at a different point than the gauge on the dashboard and thus the temperature at the different point differs (most likely explanation as the gauge seats on the center)
  • ECU temperature sensor is faulty and reports incorrect readings
  • Thermostat is old and opens at a different temperature than a new thermostat opens at, but if the gauge is fine, it would require an equal and opposite error to seem fine
  • Thanks. I will try to replace the temp sensor. do you think the current situation could cause high fuel consumption?
    – Ashmilo
    Commented Mar 18, 2019 at 9:30

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