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P0198

EOT Sensor high voltage (low temperature)

EOT Sensor high voltage (low temperature)

Documented for: 2.0L gasoline; 2.5L/3.0L gasoline · System(s): EMS EOBD, EMS OBD II · Factory MIL flag: 2 · Default action: ECM Default: –ECT substituted

Common causes

  • EOT Sensor disconnected EOT Sensor to ECM sensing circuit: high resistance
  • open circuit
  • short circuit to B+ voltage EOT Sensor failure

Quick checks

  • Confirm freeze-frame and conditions when the code set
  • Inspect connectors, grounds, and harness for the circuit named in the code
  • Compare live sensor values vs expected (unplugged/biased sensors are common)

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