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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 578 · 17311–17340 shown
Enhanced PID
[AT] Gear

Great Wall · No scalar unit · 3 profiles

Enhanced PID
[AT] Gear

Hyundai · °C · 1 profiles

Enhanced PID
[AT] Gear

Mitsubishi · No scalar unit · 3 profiles

Enhanced PID
[AT] Gear

Nissan · No scalar unit · 1 profiles

Enhanced PID
[AT] Gear

Peugeot · No scalar unit · 1 profiles

Enhanced PID
[AT] Gear

KG Mobility · No scalar unit · 3 profiles

Enhanced PID
[AT] Gear

Audi · No scalar unit · 3 profiles

Enhanced PID
[AT] Gear

Volkswagen · No scalar unit · 3 profiles

Enhanced PID
[AT] Gear

Belgee · No scalar unit · 1 profiles

Enhanced PID
[AT] Gear #2

Chevrolet · No scalar unit · 1 profiles

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