NVM RF HR Failure
The vehicle's non-volatile memory (NVM) for the RF (radio frequency) home recall system has failed, similar to a corrupted save file in a video game. The ECU cannot properly store or retrieve the learned home position data for the power seat or mirrors.
The ECU performs periodic self-diagnostics on its non-volatile memory storage to verify data integrity for RF-controlled comfort features like seat and mirror memory. It checks memory checksum values and read/write cycle reliability.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| NVM Checksum Value | Calculated checksum matches stored value | Checksum mismatch indicates data corruption |
| Memory Read/Write Success Rate | 100% successful read/write cycles | Repeated write failures or inconsistent data retrieval |
Code B2145 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, B2145 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.