P0198
Engine Oil Temperature Sensor High
Engine oil temperature sensor signal exceeds maximum. Shorted to voltage, open ground or open sensor.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Signal wire shorted to voltageCommon
- Sensor open-circuitPossible
Parts involved
- Engine Oil Temperature Sensor
- Sensor Wiring
P0198 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.