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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 507 · 15181–15210 shown
C1284
Oil Pressure Switch Failure

5 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

C1286
Booster Mechanical Failure

5 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

C1291
Reverse switch

2 reference families · Dodge / Mitsubishi, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

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