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 or reserved

P340A

Deactivation/Intake Valve Control Circuit Bank 1

Generic electrical fault on the cylinder deactivation/intake valve control circuit on bank 1. The mechanism that switches off intake valves on selected cylinders cannot be commanded.

SystemPowertrain
Typegeneric or reserved
GroupP3
Range / number4 / 0A

Possible causes

  • Deactivation solenoid failed high
  • Wiring break or unplugged connector medium

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 200–1500 €
  • Estimated time: 1.5–6 h
  • Component: cylinder deactivation solenoid
  • Component: actuator 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