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!

Powertrain generic / SAE

P263B

MIL Control Circuit High

Voltage on the malfunction indicator lamp control line is above the expected window. Typical causes are a short to battery or an open lamp.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / 3B

Possible causes

  • Control wire shorted to B+ high
  • Burnt-out MIL bulb medium
  • Connector pins corroded - high contact resistance low

Inspection / repair

  • Difficulty: easy
  • DIY: possible
  • Estimated cost: 40–250 €
  • Estimated time: 0.3–1.5 h
  • Component: mil lamp
  • Component: instrument cluster
  • Component: wiring harness
  • 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