U0668
Lost Communication With Engine Oil Level Sensor Circuit
U0668 is an OBD-II diagnostic trouble code meaning: Lost Communication With Engine Oil Level Sensor Circuit. Common causes: oil level sensor malfunction, open or short circuit in wiring. Estimated repair cost: $17–56.
Symptoms
- The oil level warning light is on
- No oil level readings on the dashboard
- Error message on the on-board computer display
- There may be other related errors in the system
- In some cases, the warning system does not work correctly
Causes
- Oil level sensor malfunction
- Open or short circuit in wiring
- Poor contact in the sensor connector
- Corrosion or oxidation of contacts
- Engine control unit malfunction
How to Fix
- Check the integrity of the wiring to the sensor
- Clean and check sensor connector contacts
- Check power and ground on the sensor
- Replace the oil level sensor if necessary
- Carry out diagnostics of the control unit in case of repeated errors
Related codes
Error U0668 by Vehicle Brand
FAQ
What does the U0668 code mean?
U0668 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Engine Oil Level Sensor Circuit
What causes a U0668 error code?
The most common causes of U0668 include: Oil level sensor malfunction; Open or short circuit in wiring; Poor contact in the sensor connector; Corrosion or oxidation of contacts.
How do I fix a U0668 diagnostic trouble code?
To fix U0668: Check the integrity of the wiring to the sensor. Clean and check sensor connector contacts. Check power and ground on the sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0668?
Limited driving only, diagnose soon
How much does it cost to fix U0668?
The estimated repair cost for U0668 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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