P0198

Engine Oil Temperature Sensor A Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–89 (est.)

Symptoms

Unstable engine operation
Incorrect oil temperature readings on the dashboard
Increased fuel consumption
Check Engine Light Illuminates

Causes

Oil temperature sensor malfunction
Open or short circuit in wiring harness
Poor contact in the sensor connector
ECU malfunction

How to Fix

Check the condition of the oil temperature sensor and its connector
Check the integrity of the wiring harness
Measure the sensor resistance and compare with the nominal values
Replace sensor if necessary
Clear error memory and check if error is returned

Related codes

P0197 P0199 P0115