OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Network generic / SAE

U0600

Internal Control Module Memory Reset

A control module reports that its non-volatile memory has been reset (lost adaptions, lost coding, lost trip counters). Often appears after battery disconnects, voltage drops below operating limit, or module reflashes.

SystemNetwork
Typegeneric / SAE
GroupU0
Range / number6 / 00

Possible causes

  • Battery disconnected or low voltage event high
  • Module reflash or coding change medium
  • Gateway module routing CAN messages incorrectly low

Symptoms

  • Multiple warning lights may illuminate
  • Affected modules may go into limp mode or shut down
  • Specific functions inoperative depending on module
  • Diagnostic tools may show communication faults

Inspection / repair

  • Difficulty: easy
  • DIY: possible
  • Estimated cost: 20–200 €
  • Estimated time: 0.1–1 h
  • Component: control module
  • MIL / check engine light

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication