U0667

Lost Communication With Engine Oil Temperature Sensor A

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Deterioration of vehicle dynamics
Increased fuel consumption
Incorrect oil temperature readings on the dashboard
Emergency engine operation

Causes

Open or short circuit in the sensor circuit
Oil temperature sensor malfunction
Poor contact in the sensor connector
Wiring harness damage
Engine ECU malfunction

How to Fix

Check the continuity of the oil temperature sensor circuit
Inspect the sensor connector and contacts for oxidation or damage.
Check sensor resistance at different temperatures
Replace the oil temperature sensor if necessary
Scan the ECU for other errors

Related codes

U0668 U0100 U0121