OBD LensOBD Lens App

Diagnostic comparisons

Compare OBD codes and concepts

P0420 vs P0430

Upstream vs downstream O2 sensor

Bank 1 vs Bank 2

OBD1 vs OBD2: scope

Diagnostic knowledge search

23,879 code identifiers with scoped meanings, and 54,261 enhanced signal definitions. No VIN or personal information is needed.

Diagnostic explainers

Pending, stored and permanent codes · Enhanced PIDs and Mode 22

78,140 matches

Page 991 · 29701–29730 shown
Enhanced PID
EGR duty

Subaru · % · 1 profiles

Enhanced PID
EGR open

Mazda · % · 1 profiles

Enhanced PID
EGR open

Ford · % · 2 profiles

OBD Lens reference library · catalog legacy-owner-2026-11-02-v84-evidence. Sources and scope