Vehicle Communication Bus E
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.
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.
Real-world scan data
Appears alongside · share of U0064 scans
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
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?+
Can I just clear U0064?+
Related codes
Read & clear U0064 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.