U0270moderate severityNetwork
Lost Communication With Body Control Module 'B'
on 2003 Ford F-150 5.4L V8 Supercharged · 4WD
What this code means
The module has lost communication with a secondary body control module over the data bus. This can disable various body electrical functions controlled by that module.
Symptoms
- Body electrical features inoperative
- Warning lights on dash
- Intermittent module functions
Common causes
- Faulty body control module 'B'
- Damaged CAN bus wiring
- Loss of power or ground to module
- Corroded connectors
Diagnostic steps
- Scan all modules for stored codes
- Check power and ground at the module
- Test CAN bus wiring continuity and resistance
- Inspect connectors for corrosion or damage
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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