Home › OBD2 PID Decoder › 0120
Mode 01 • PID 20

OBD2 PID 0120

PIDs supported 21-40

Definition

Mode
01 (hex)
PID
20 (hex)
Data bytes
4
Formula
Bit encoded [A7..D0] == [PID 0x21..PID 0x40]
Units
—

How to read PID 0120

Send mode 01 with PID 20 over OBD-II. The ECU returns 4 data byte(s), decoded with Bit encoded [A7..D0] == [PID 0x21..PID 0x40] (A, B, C, D are the returned bytes in order). The result is “PIDs supported 21-40”. This is standard SAE J1979 data supported by most OBD-II scan tools and loggers.

Why it matters for tuning

Live PIDs like this are how tuners and workshops verify a remap on the road — logging RPM, load, boost, lambda and temperatures to confirm the map is safe. The desktop Softechpro Solutions software complements live logging with offline ECU editing: DPF/EGR/AdBlue/DTC off and Stage tuning with automatic checksum.

Related PIDs

011C OBD standards this veh011D Oxygen sensors present011E Auxiliary input status011F Run time since engine 0121 Distance traveled with0122 Fuel Rail Pressure (re0123 Fuel Rail Pressure (di0124 O2S1_WR_lambda(1): Equ

Professional ECU tuning software

DPF/EGR/AdBlue/DTC off + Stage — from €98.99/mo.

See pricing   WhatsApp

← OBD2 PID decoder tool