P0197

Engine Oil Temperature Sensor A Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–111 (est.)

Symptoms

Incorrect oil temperature readings on the dashboard
Engine performance deterioration
Check Engine Light Illuminates
Increased fuel consumption

Causes

Malfunction of the engine oil temperature sensor
Open or short circuit in wiring harness
Poor contact in the sensor connector
ECU malfunction (rare)

How to Fix

Check the condition of the oil temperature sensor and its connector
Check the integrity of the wiring harness from the sensor to the ECU
Measure the sensor resistance and compare with reference values
If necessary, replace the sensor or repair the wiring harness
Clear the error code and check if it returns

Related codes

P0195 P0196 P0198