OBD LensOBD Lens App

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 487 · 14581–14610 shown
C056D
Electronic Control Unit Hardware; Electronic Control Unit Hardware Signal Erratic; Electronic Control Unit Hardware Low Signal Amplitude; Electronic Control Unit Hardware Internal Checksum Error; Electronic Control Unit Hardware General Memory Malfunction; Electronic Control Unit Hardware Special Memory Malfunction; Electronic Control Unit Hardware RAM Malfunction; Electronic Control Unit Hardware ROM Malfunction; Electronic Control Unit Hardware EEPROM Performance/Malfunction; Electronic Control Unit Hardware Software Malfunction; Electronic Control Unit Hardware Internal Malfunction; Electronic Control Unit Hardware Incorrect Component Installed; Electronic Control Unit Hardware Self-Test Malfunction; Electronic Control Unit Hardware Internal Communication Malfunction; Electronic Control Unit Hardware EEPROM Incorrect Programming

1 reference families · GM

C056E
Electronic Control Unit Software; Electronic Control Unit Software Supervision Software Malfunction; Electronic Control Unit Software Not Programmed; Electronic Control Unit Software Calibration Not Programmed; Electronic Control Unit Software EEPROM Incorrect Programming; Electronic Control Unit Software Variant Not Programmed; Electronic Control Unit Software Configuration Not Programmed; Electronic Control Unit Software VIN Not Programmed; Electronic Control Unit Software Security Code Not Programmed; Electronic Control Unit Software Programming Checksum Error; Electronic Control Unit Software Calibration Not Learned; Electronic Control Unit Software Not Plausible; Electronic Control Unit Software Invalid Data

1 reference families · GM

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