P0198 - Engine Oil Temperature Sensor Circuit High Input

The engine oil temperature sensor signal is higher than expected.

Code Overview

The engine oil temperature sensor signal is higher than expected.

Common Causes

• Failed engine oil temperature sensor
• Damaged wiring or connector at the engine oil temperature sensor
• Open or short in the circuit

Diagnostic Steps

1. Inspect the engine oil temperature sensor connector and wiring
2. Verify reference voltage, ground, and signal
3. Compare scan data to a realistic known-good reading

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.