P0199

Engine Oil Temperature Sensor A Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable idle speed
Increased fuel consumption
Check Engine Light Illuminates
Deterioration of vehicle dynamics

Causes

Faulty oil temperature sensor
Open or short circuit in the sensor circuit
Poor contact in sensor circuit connectors
Engine control unit (ECU) malfunction

How to Fix

Check the continuity of the oil temperature sensor circuit
Check sensor connections and connectors
Replace the oil temperature sensor if necessary
Check the operation of the engine control unit

Related codes

P0198 P0197 P0115 P0116