U0495 indicates that the vehicle's network has received invalid or corrupt data from the Digital Audio Control Module B. This usually points to a communication problem between the module and the rest of the vehicle's CAN bus system rather than a fault in the engine computer.
The module itself may be internally damaged, causing it to send malformed messages on the CAN bus.
Harness wires, pins, or connectors linking the module to the network can suffer wear, moisture ingress, or physical damage, leading to intermittent or invalid data.
Insufficient voltage, a blown fuse, or a poor ground connection can cause the module to operate incorrectly and transmit corrupt data.
Bus off conditions, high resistance, or noise on the CAN lines can corrupt the messages sent from the module, triggering U0495.
The module's internal firmware may be outdated or corrupted, resulting in improper message formatting.
While the powertrain control module rarely causes this code, a severe PCM fault that disrupts CAN‑bus timing could theoretically produce invalid data from attached modules.
No. The powertrain control module is rarely the cause of this code; most cases are due to the audio module itself, its wiring, connectors, or CAN‑bus issues. Replacing the PCM without first checking those components usually does not resolve the problem.
Yes. If the fuse supplying power to the Digital Audio Control Module B is open, the module may operate erratically or send invalid data, triggering the code.
Yes. Once the underlying issue is repaired, clear the DTC with a scan tool and verify that the code does not return during a test drive or system check.