P0199
PowertrainTemperature Sensorlow severityEngine Oil Temperature Sensor Circuit Intermittent
What P0199 Means
The engine oil temperature sensor signal is dropping out intermittently. Usually caused by a loose connection or damaged wiring.
Symptoms
- Check engine light on
- Intermittent shift issues
- Erratic temperature reading
Common Causes
- Loose or corroded connector
- Damaged sensor wiring
- Failing oil temperature sensor
- Faulty PCM
Diagnostic Steps
- Retrieve stored codes
- Inspect connector and harness
- Wiggle-test wiring while watching signal
- Replace sensor if it drops out
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