| Category | Specific Cause | |----------|----------------| | Wiring | Open or short circuit in CAN H or CAN L lines between TCM and ECM | | Connectors | Corrosion, bent pins, or poor terminal fit | | Power/Ground | Faulty TCM or ECM power supply or ground | | Module Fault | Internal TCM failure (most common after water ingress or overheating) | | Module Fault | Internal ECM failure (less common) | | Interference | Aftermarket electronics (remote start, alarm, tuner) disrupting CAN bus |
Since this code involves the communication network, the symptoms can be widespread and sometimes frightening. You might experience: nissan u1025-00
Rodents (mice and rats) love the soy-based insulation used on modern wiring. They often chew through the wires that make up the CAN bus. Because these wires are twisted together, a bite mark can cause a "short" between the CAN High and CAN Low wires, killing communication. Because these wires are twisted together, a bite
After repair, take these steps to avoid future CAN faults: Because these wires are twisted together