U0067
Vehicle Communication Bus E (+) Low
Communication network (CAN bus)
Generic OBD-II
Medium
What it means
U0067 means the positive wire of bus E is reading lower than expected, so modules on that network struggle to communicate. It usually points to a short to ground, high resistance, or a module dragging the line down. Because the affected systems are whatever the manufacturer put on bus E, the result is typically warning lights and lost features rather than an engine that won't start.
Medium
Can I keep driving? Usually drivable with warning lights, but a low bus voltage can disable the modules on bus E — confirm nothing critical dropped off.
Common symptoms
What you'll notice
- Warning lights for the systems on bus E
- Modules on that bus unresponsive or intermittent
- Features tied to bus E dropping out or defaulting
- Additional U-series communication codes stored
Common causes
Most likely first
- Short to ground on the bus E (+) wire pulling voltage lowLikely
- High resistance or a partial open in the bus wiringCommon
- Corroded or loose connector pins on the networkCommon
- A failing module dragging the bus line downLess often
- Water intrusion into a bus connectorLess often
How to diagnose & fix
Work through it in order
- Scan all modules and note which ones on bus E are affected.
- Back-probe the bus E (+) line and compare voltage to spec in the wiring diagram.
- Inspect the harness and connectors for shorts to ground, corrosion, or moisture.
- Disconnect modules one at a time to find one pulling the bus low.
- Repair the wiring or module, clear the code, and verify communication is restored.
FAQ
Quick answers
Is it safe to drive with U0067?+
Generally yes if only body/comfort modules are on bus E, but the affected features and warnings won't work reliably. Get it checked soon.
Can I just clear U0067?+
It returns as long as the bus voltage stays low. The short or high-resistance connection has to be repaired first.
Related codes
Often seen with U0067
Read & clear U0067 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