Live Data & PIDs (Liberty KK 3.7L)

Use Live Data to chase problems that don’t throw a code — pressure leaks, lazy sensors, misfires, charging faults. Below are the headline numbers; the full PID tables and the 8 scenario playbooks live in the J-Scan guide app under Live Data — troubleshooting.

Verified J-Scan PID labels (petrol)

These labels were confirmed from J-Scan sources — confirm exact spelling in the app’s Live Data search:

Misfire Cyl 1–6 (petrol), Total Misfire Counter
O2 B1/S1 Volts (+ …/Goal, …/Ready, …/Heater Temp), Engine RPM
Transmission Fluid Temp, LF/RF/LR/RR Wheel Speed
CVI clutch volumes: UD / OD / 2-4 / L-R (42RLE)

Key operating ranges

| Parameter | Healthy (warm idle) | Off-range points to | Source | | --- | --- | --- | --- | | Fuel System Pressure | 58 ± 5 psi | Pump / regulator / filter | FSM | | Oil pressure | ≥ 4 psi idle · 25–110 psi @ 3000 rpm | Pump / bearings / sender | FSM | | ECT (warm) | ~195 °F / ~90 °C (thermostat) | Thermostat / coolant / sensor | FSM | | STFT / LTFT | ±10 % | Vacuum leak (lean), fuel issue (rich) | OBD-II guideline | | MAP (key-on, engine off) | ≈ barometric | MAP sensor / vacuum | OBD-II guideline | | System voltage (running) | ~13.5–14.7 V | Alternator / regulator | OBD-II guideline |