OBD-II code · Network
U0064 Vehicle Communication Bus E
Generic fault on bus E (fifth bus). A communication loss with this module breaks any function relying on its data — diagnostic tools may show 'no response' and dependent modules can fall into limp mode.
Is it safe to drive with U0064?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWiring or node fault on bus E
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Bus E Wiring, Bus E Nodes
Related codes
- U0028Vehicle Communication Bus A
- U0029Vehicle Communication Bus B
- U0037Vehicle Communication Bus B
- U0046Vehicle Communication Bus C
- U0055Vehicle Communication Bus D
- U0089Vehicle Communication Bus G
- U009BVehicle Communication Bus I
- U009DVehicle Communication Bus J
- U0061Vehicle Communication Bus D (-) Low
- U0062Vehicle Communication Bus D (-) High
- U0063Vehicle Communication Bus D (-) shorted to Bus D (+)
- U0065Vehicle Communication Bus E Performance
- U0066Vehicle Communication Bus E (+) Open
- U0067Vehicle Communication Bus E (+) Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.