U007E: Control Module Communication Bus L Off
Standardized SAE J2012 code · U00xx — Network electrical
What does U007E mean?
The control module communication bus L is off — the gateway has shut down or isolated this bus, often due to repeated bus errors or a "bus off" event in the CAN controller.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
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
Common causes
- High CAN controller in bus-off state
- Low Gateway module routing CAN messages incorrectly
- Low CAN terminating resistor (120 Ω) drifted out of spec
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of U007E on the same make and model first.
U007E in the community
Ask about U007ENo one has posted about U007E yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your U007E problem