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

P2018

Intake Manifold Runner Position Sensor/Switch Circuit Open (Bank 2)

The ECU detects an open circuit on the IMRC position sensor on bank 2. Without position feedback the ECU cannot confirm runner switching and falls back to a default mode.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / 18

Possible causes

  • Sensor element open high
  • Signal wire open medium
  • Pin pushed back out of connector body low

Inspection / repair

  • Difficulty: medium
  • DIY: possible
  • Estimated cost: 80–400 €
  • Estimated time: 0.5–2 h
  • Component: imrc position sensor b2
  • Component: imrc wiring
  • MIL / check engine light
  • emissions-relevant
  • drive cycle required

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