Nissan
CAN communication fault: a Nissan module lost contact with others on the network. The module that logs it is rarely the faulty one.
U1000 fault code: what it means
U1000: CAN communication fault: a Nissan module lost contact with others on the network. The module that logs it is rarely the faulty one.
Usual causes, most likely first
- poor or corroded earth connections
- weak or failing 12V battery
- CAN wiring or connector fault
- faulty control module
U1000 by make
What the repair usually costs
- Hybrid 12 V auxiliary battery (Aqua / Prius C / Axio, S34B20R)NZ$330–NZ$510 · A$310–A$500
- Hybrid 12 V auxiliary battery (Prius 30 / Prius alpha / CT200h, S46B24R AGM)NZ$390–NZ$690 · A$360–A$590
- Hybrid 12 V auxiliary battery (Camry / RAV4 / C-HR / Lexus, S55D23R or LN1-LN2 AGM)NZ$420–NZ$770 · A$390–A$730
- EV 12 V battery replace (Nissan Leaf / e-NV200, lead-acid)NZ$200–NZ$340 · A$210–A$380
Not sure what U1000 means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.