What does it mean?
U0171 is a Network and Communication (CAN bus, module communication) fault code. It indicates: Lost Communication With Restraints System Sensor B.
Lost Communication With Restraints System Sensor B
Severity
Medium
Can I keep driving?
Usually drivable, but get it diagnosed without delay.
How is this code read?
This is a standard OBD-II code; any basic scanner reads it on vehicles built after 2004.
- UNetwork
- 0Generic code
- 1Network / Communication
- 71Sequence number
Codes From the Same System
All Fault Codes- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
Related Similar Codes
- U0170Lost Communication With Restraints System Sensor A
- U0172Lost Communication With Restraints System Sensor C
- U0173Lost Communication With Restraints System Sensor D
- U0174Lost Communication With Restraints System Sensor E
- U0175Lost Communication With Restraints System Sensor F
- U0176Lost Communication With Restraints System Sensor G
- U0177Lost Communication With Restraints System Sensor H
- U0178Lost Communication With Restraints System Sensor I
This information follows the generic OBD-II definition and does not replace a vehicle-specific diagnosis. The severity rating is rule-based; an authorised diagnostic reading is required for a definitive answer.