The comfort CAN is a low-speed network (125 kbps) that is extremely sensitive to voltage fluctuations. If your battery voltage drops below during cranking or while idling, the BSI will log A9B7 as a "lost communication" event.
An "Anti-Pollution System Fault" or general electrical failure message often accompanies this code. a9b7 peugeot
When the connection between the driver IC and the glass panel degrades, the screen loses its ability to render the pixel matrix, resulting in the "White Screen" phenomenon. The comfort CAN is a low-speed network (125
If the reset doesn't work, a diagnostic tool like or PP2000 is needed to perform an "actuator test" on the ignition relay to see if it physically clicks and functions. a9b7 peugeot
Interior & Comfort
The comfort CAN is a low-speed network (125 kbps) that is extremely sensitive to voltage fluctuations. If your battery voltage drops below during cranking or while idling, the BSI will log A9B7 as a "lost communication" event.
An "Anti-Pollution System Fault" or general electrical failure message often accompanies this code.
When the connection between the driver IC and the glass panel degrades, the screen loses its ability to render the pixel matrix, resulting in the "White Screen" phenomenon.
If the reset doesn't work, a diagnostic tool like or PP2000 is needed to perform an "actuator test" on the ignition relay to see if it physically clicks and functions.
Interior & Comfort