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

P0105

Manifold Absolute Pressure / Barometric Pressure Circuit Malfunction

The ECU detects a general electrical malfunction in the manifold absolute pressure (MAP) or barometric pressure sensor circuit. Signal missing, implausible, or wiring broken. Generic fault when no more specific MAP code applies.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 05

Possible causes

  • MAP sensor failed high
  • Vacuum hose to MAP sensor cracked or disconnected medium
  • MAP wiring or connector fault medium

Inspection / repair

  • Difficulty: easy
  • DIY: possible
  • Estimated cost: 40–200 €
  • Estimated time: 0.3–1 h
  • Component: map sensor
  • Component: barometric pressure sensor
  • Component: map wiring
  • Component: vacuum hose
  • 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