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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

78,140 matches

Page 566 · 16951–16980 shown
P0300
Random/multiple cylinder(s) - misfire detected

14 reference families · BMW, Continental Synerject Easy U, Ford, Acura / Honda, Genesis / Hyundai / Kia, Datsun / Lada, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Dacia / Renault, GAC / Lexus / Toyota, УАЗ, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P0301
Cylinder 1 - misfire detected

14 reference families · BMW, Continental Synerject Easy U, Ford, Acura / Honda, Genesis / Hyundai / Kia, Datsun / Lada, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Dacia / Renault, GAC / Lexus / Toyota, УАЗ, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P0302
Cylinder 2 - misfire detected

14 reference families · BMW, Continental Synerject Easy U, Ford, Acura / Honda, Genesis / Hyundai / Kia, Datsun / Lada, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Dacia / Renault, GAC / Lexus / Toyota, УАЗ, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

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