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

P218B

Throttle/Fuel Inhibit B Circuit

A general electrical fault on the throttle/fuel inhibit signal B — used by anti-theft, immobiliser, or transmission to forbid throttle/fuel until released.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number1 / 8B

Possible causes

  • Inhibit signal lost high

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 80–1000 €
  • Estimated time: 0.5–4 h
  • Component: throttle fuel inhibit
  • Component: immobiliser
  • MIL / check engine light
  • emissions-relevant

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