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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

23,879 matches

Page 641 · 19201–19230 shown
P1000
OBD Systems Readiness Test Not Complete

11 reference families · Chrysler, Ford, ISUZU, Jaguar / Land Rover, Lincoln, Mazda, Mercedes-Benz, Mercury, Generic OBD2, Oldsmobile, Chevrolet / Citroen / General Motors / Opel / Peugeot

P1012
MPA Circuit Low

5 reference families · Chrysler, Ford, Dodge / Mitsubishi, Saab, Chevrolet / Citroen / General Motors / Opel / Peugeot

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