TV Module Error
The TV (Throttle Valve) module that controls engine airflow is malfunctioning or communicating incorrectly with the engine computer. Think of it like a faulty air valve that can't properly regulate how much air enters the engine.
The ECU monitors the TV module's internal diagnostics, voltage signals, and operational status through the CAN bus network. The module performs self-tests and reports errors when internal circuits, solenoids, or communication pathways fail. Faults are detected when the module cannot execute commands or reports invalid sensor data.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| TV Module Self-Diagnostic Status | No internal faults reported, voltage 10-14V | Self-test failure or voltage out of range |
| CAN Bus Communication | Valid messages received every 10-50ms | Timeout, missing frames, or checksum errors |
Code B2197 is a low-severity fault. Your vehicle is generally safe to drive to a workshop for diagnosis. However, do not ignore it indefinitely — low-severity codes often indicate developing problems that become expensive if neglected. Book a diagnostic appointment within 2–4 weeks. If you notice any additional symptoms (rough running, power loss, unusual smells), treat it as higher priority.
Once the fault is repaired, B2197 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.