U0064
Vehicle Communication Bus E
Communication / CAN bus
Generic OBD-II
Medium
What it means
U0064 is a general fault for Vehicle Communication Bus E, meaning the module network labeled Bus E isn't communicating correctly. Bus E is a manufacturer-defined network, so what's affected varies by vehicle. The powertrain often keeps running, but modules on Bus E can drop offline and set warning lights until the fault is found.
Medium
Can I keep driving? Depends on which modules use Bus E — the car often still drives, but any feature on that bus can drop out, so check that your gauges and safety systems respond.
Common symptoms
What you'll notice
- Several dash warning lights or messages at once
- Modules on Bus E unreachable by a scan tool
- Features tied to those modules inoperative
- Intermittent electrical faults
Common causes
Most likely first
- Damaged or chafed Bus E wiringLikely
- Corroded, loose, or unplugged connector on the busCommon
- A failed module disrupting the busCommon
- Short to power or ground on a bus wireLess often
- Water intrusion at a splice or connectorLess often
How to diagnose & fix
Work through it in order
- Scan every module and record which report no communication on Bus E.
- Inspect Bus E wiring and connectors for damage, corrosion, or shorts.
- Check the bus voltages and resistance against the manufacturer's spec.
- Disconnect suspect modules one at a time to find one disrupting the bus.
- Repair the wiring or replace the faulty module, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with U0064?+
Often yes, but it depends what's on Bus E for your vehicle. If it affects the cluster or a safety system, drive with caution and repair promptly.
Can I just clear U0064?+
It clears but returns while the bus fault remains. Find and fix the wiring or module first.
Related codes
Often seen with U0064
Read & clear U0064 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX