garajizOBD-II code · generic
U0666
Lost Communication With Reductant Pressure Sensor
- System
- U — In-vehicle network
- Severity
- Moderate (3/5)
- Can I keep driving?
- Drive with caution
What does U0666 mean?
U0666 is defined as “Lost Communication With Reductant Pressure Sensor”.
Drive gently and only as far as you need to; have it checked as soon as possible.
Related codes
- U0665Lost Communication With Fuel Rail Pressure Sensor Bank 2
- U0667Lost Communication With Engine Oil Temperature Sensor A
- U0664Lost Communication With Rear HVAC Air Cutoff Actuator
- U0668Lost Communication With Engine Oil Level Sensor Circuit
- U0663Lost Communication With Rear Mode Actuator
- U0669Lost Communication With EGR Sensor D
Look up another code
This page is general information; an exact diagnosis needs measurements and a technician’s check.