U0013moderate severityNetwork
Control Module Communication Bus A High
on 2018 Lexus LC 500h 3.5L V6 Hybrid · RWD
What this code means
The voltage on communication bus A is too high, interfering with module data exchange. Modules may drop offline intermittently.
Symptoms
- Multiple system faults
- Warning lamps on
- Intermittent module dropout
Common causes
- Bus A wiring shorted to voltage
- Faulty control module
- Corroded connectors
- Damaged wiring harness
Diagnostic steps
- Scan network for U-codes
- Measure bus A voltage
- Inspect wiring for short to power
- Isolate faulty module
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Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus