P0198 OBD II Trouble Code Engine Oil Temperature Sensor High

How to diagnose, repair, as well as symptoms and causes of a P0198 engine code which is a high voltage signal from the engine oil temperature sensor. Also includes links to relevant forum topics on the code.

Symptoms of P0198 OBD II Trouble Code

  • Illuminated Check Engine Light

Common Causes of P0198 OBD II Trouble Code

  • Engine cooling system problems
  • Wiring problems
  • Faulty engine oil temperature sensor
  • Faulty PCM

Severity of P0198 OBD II Trouble Code

The severity of these codes is moderate to severe. In some cases, these codes set along with coolant temperature codes, can indicate an engine overheat condition. It?s a good idea to address this code as soon as possible.