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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 582 · 17431–17460 shown
P0500
Vehicle speed sensor (VSS) - circuit malfunction

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

P0501
Vehicle speed sensor (VSS) - range/performance problem

12 reference families · BMW, Continental Synerject Easy U, Ford, Acura / Honda, Datsun / Lada, Mercedes-Benz, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P0502
Vehicle speed sensor (VSS) - low input

10 reference families · BMW, Ford, ISUZU, Mercedes-Benz, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P0505
Idle speed control (ISC) system - malfunction

12 reference families · BMW, delphimt05, Ford, Acura / Honda, Datsun / Lada, Mercedes-Benz, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P0506
Idle speed control (ISC) system - rpm lower than expected

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

P0507
Idle speed control (ISC) system - rpm higher than expected

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

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