First only narrowband sensor was supported. Nowadays most users use wideband because advantages are astonishing and costs are acceptible with Genboard v3. However there might be situations when narrowband sensor is kept.
The NBO2 signal wire is connected to the 2nd nernst channel (EC18-13).
R103 is left off, so the amplifier is not amplifying, just buffering (protecting the processor).
These parameters determine how the Exhaust Gas Oxygen correction reacts for NBO2. WideBand is much much much more useful, and now affordable for everyone for the first time in history, thanks to VEMS. Read Section 9.6, “Wide Band Oxygen” instead of this page if you have WBO2.
Notes:
| Variable Name | Starting point value | Units | Description |
|---|---|---|---|
| ego_conf | 0x20 | Main EGO configuration. Use 0x20 for NBO2 sensors. | |
| ego_pid_kp | Narrowband EGO PID kp. | ||
| mt_unused | Unused. Don't change this. | ||
| ego_delta | Minimum useful change in narrowband O2 reading. | ||
| ego_target | Sensor target voltage. | ||
| ego_pid_window | Minimum window for PID to react. | ||
| ego_coolant | 0x92 (146) | TODO: 0x01=? | Minimum coolant temp for EGO correction enabling. |
| ego_maxtps | 0xFF (255) | 0x01=0.4% open | Max TPS position for EGO correction enabling. |
| ego_maxmap | 0xFF (255) | 0x01=0.4% | Max MAP pressure for EGO correction enabling. |
| ego_minrpm | 0x08 (8) | 0x01=100rpm | Minimum engine speed for EGO correction enabling. |
| ego_maxrpm | 0xFF (255) | 0x01=100rpm | Max engine speed for EGO correction enabling. |
| ego_lean_limit | 0x30 (48) | 0x01=0.4% | Max percent of AFR enrichment allowed. |
| ego_rich_limit | 0x80 (128) | 0x01=0.4% | Max percent of AFR enrichment allowed. |
| wbo2_warmup_target | 0xFF (255) | Unused. |
Table 9.5. NBO2 sensor config variables