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U0668: Lost Communication With Engine Oil Level Sensor Circuit

What Does U0668 Mean?

U0668 is a diagnostic trouble code indicating: Lost Communication With Engine Oil Level Sensor Circuit. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

What To Do Next

  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

U0663 Lost Communication With Rear Mode Actuator U0664 Lost Communication With Rear HVAC Air Cutoff Actuator U0665 Lost Communication With Fuel Rail Pressure Sensor Bank 2 U0666 Lost Communication With Reductant Pressure Sensor U0667 Lost Communication With Engine Oil Temperature Sensor A U0669 Lost Communication With EGR Sensor D U0670 Lost Communication With Fuel Temperature Sensor A U0671 Lost Communication With Fuel Temperature Sensor B