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

P3498

Cylinder Deactivation Pressure Sensor Bank 1

The engine control module has detected a fault with the bank 1 cylinder deactivation pressure sensor. Newer variable displacement systems use an analogue oil pressure sensor in addition to or in place of the legacy switch; a fault disables closed-loop deactivation control on bank 1.

SystemPowertrain
Typegeneric or reserved
GroupP3
Range / number4 / 98

Possible causes

  • Pressure sensor failed high
  • Wiring or connector fault medium
  • Sensor port contaminated by sludge low

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 150–900 €
  • Estimated time: 1–4 h
  • Component: oil pressure sensor
  • Component: engine wiring harness
  • Component: ecm
  • 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