Data Mismatch #2 (receive data does not match what was expected)
Your vehicle's computer received data from a module that doesn't match what it expected—like ordering a pizza and getting a hamburger instead. This is a communication error between different control modules in your vehicle.
The primary ECU communicates with secondary modules (body control, transmission, ABS) via CAN bus or similar networks. It expects specific data packets with matching checksums and frame IDs within defined time windows. When received data format, value range, or checksum fails validation, the mismatch fault triggers.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Data Checksum/CRC | Calculated checksum matches transmitted value | Checksum mismatch detected |
| Message Reception Timing | Data received within expected interval (typically <100ms) | Data received outside expected interval or missing entirely |
Code B2162 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, B2162 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.