Home › OBD2 PID Decoder › 0154
Mode 01 • PID 54

OBD2 PID 0154

Evap system vapor pressure

Definition

Mode
01 (hex)
PID
54 (hex)
Data bytes
2
Formula
A*256+B - 32768
Range
-32767 – 32768 Pa
Units
Pa

How to read PID 0154

Send mode 01 with PID 54 over OBD-II. The ECU returns 2 data byte(s), decoded with A*256+B - 32768 (A, B, C, D are the returned bytes in order). The result is “Evap system vapor pressure” in Pa. 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

0150 Maximum value for air 0151 Fuel Type0152 Ethanol fuel %0153 Evap system vapor pres0155 Short term secondary o0156 Long term secondary ox0157 Short term secondary o0158 Long term secondary ox

Professional ECU tuning software

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

See pricing   WhatsApp

← OBD2 PID decoder tool