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Diagnostic knowledge / DTC and enhanced PID meanings — Knowledge search

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

54,261 matches

Page 397 · 11881–11910 shown
Enhanced PID
RegenCoop

Toyota · No scalar unit · 1 profiles

Enhanced PID
RegenOp

Toyota · N·m · 1 profiles

Enhanced PID
RegenReq

Toyota · N·m · 1 profiles

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