MotorBitHome / Live data
Live data glossary
A code is a flag. These numbers are the evidence. Watch them in MotorBit next to RPM, then compare to freeze frame from when the light set.
| PID | Mode | Unit | Why it matters |
|---|---|---|---|
| Mass air flow (MAF) | 01 10 | g/s | Mass air flow in grams per second is how much air the ECU thinks is entering the engine. Learn typical idle ra… |
| Oxygen sensor voltage | 01 14 / 15 | V | Upstream O2 voltage should switch in closed loop. Downstream should be quieter. Learn how that pattern relates… |
| Engine coolant temperature | 01 05 | °C / °F | ECT tells the ECU how warm the engine is. A stuck-cold reading wastes fuel and can set P0128. Learn typical wa… |
| Throttle position | 01 11 | % | Throttle position should be near 0% at idle and rise smoothly as you press the pedal. Learn what a jumpy or st… |
| Calculated engine load | 01 04 | % | Calculated engine load is how hard the engine is working, not the same as throttle. Use it to read freeze fram… |
| Fuel trim (STFT / LTFT) | 01 06–09 | % | How far the ECU is correcting the mixture. Lean and rich codes live here. |
Also read freeze frame — it is the same PIDs, frozen at the moment the fault set.