Code U0095 indicates that the voltage on the High-speed Controller Area Network (CAN Bus H) is lower than the expected operating range. This suggests a communication failure where the signal on the high line is being pulled toward ground or is interrupted.
The CAN-High signal wire is physically pinched or rubbed through, creating an electrical path to the vehicle chassis.
An open circuit or break in the wiring prevents the high-voltage signal from reaching the destination module.
Moisture or oxidation in a module connector increases resistance or creates a bridge that pulls the signal voltage down.
An internal failure within a connected module (such as the BCM or ABS module) is pulling the entire bus voltage low.
A failure in the main engine computer's communication transceiver, though this is significantly less common than wiring faults.
Low system voltage can cause general communication errors, but U0095 specifically identifies a voltage level issue on the High line, which is more typically related to wiring or hardware failure.
No; U0095 is rarely caused by the PCM. It is far more common for the issue to be a wiring short or a failed peripheral module. The PCM should only be replaced after all wiring and other modules have been ruled out.
It is generally unsafe, as the vehicle may lose critical safety functions such as electronic stability control, ABS, or power steering communication.