U1000
Medium SeverityClass 2 Communication Malfunction
Network/Communication System
What Does U1000 Mean?
General CAN bus communication error. Often manufacturer-specific.
Common Fix
Repair connection or wiring
Estimated Cost (DIY)
$0 - $300
Symptoms
- ⚠️Check engine light
- ⚠️Various warning lights
- ⚠️Intermittent electrical issues
Related Symptoms
Common Causes
How to Diagnose U1000
- 1Check all module connectors
- 2Scan all modules for codes
- 3Check CAN bus wiring
OEM Diagnostic Flowchart
Scroll to load technician if/then branches.
U1000 requires a scanner that reads network modules — basic code readers won't see it.
Related Resources
Repair guides, symptom pages, and wiring diagrams related to U1000.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 Infiniti G37 Convertible V6-3.7L (VQ37VHR) Service Manual | Operation CHARM Operation CHARM :...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Infiniti G37 Coupe V6-3.7L (VQ37VHR) Service Manual | Operation CHARM Operation CHARM : Car r...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Infiniti G37 Sedan V6-3.7L (VQ37VHR) Service Manual | Operation CHARM Operation CHARM : Car r...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Infiniti G37x Coupe AWD V6-3.7L (VQ37VHR) Service Manual | Operation CHARM Operation CHARM :...
Related Symptoms
Browse →Exact Vehicle Hubs
Browse →Open the exact vehicle hub grounded by OEM manual evidence related to U1000.
Open the exact vehicle hub grounded by OEM manual evidence related to U1000.
Open the exact vehicle hub grounded by OEM manual evidence related to U1000.
Open the exact vehicle hub grounded by OEM manual evidence related to U1000.
Related Codes
Frequently Asked Questions
- Is U1000 a Nissan-specific code?
- U1000 is very common on Nissans and means the CAN bus had a communication glitch. Often caused by a weak battery or loose connector.
- Can a battery change fix U1000?
- Sometimes yes — low battery voltage can cause CAN bus errors. A new battery or terminal cleaning often resolves it.