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OBDII/EOBD diagnostics trouble codes definition

If your car supports OBD II or EOBD, then you can already use almost 5000 generic OBDII codes. These codes are from PowerTrain series (P0XXX, P2XXX, P34XX), Body Series (B0XXX), Chassis series (C0XXX), Network series (U0XXX, U2XXX, U3XXX).

Also there is a list of more than 13500 additional manufacturer specific codes.

Supported manufacturers with specific OBD2 codes:


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Definition of check engine code P1109:

Citroen/Peugeot:

IAT - B Sensor Intermittent

Daewoo:

FUEL PUMP - PERFORMANCE

Fiat:

Electric fan - assembly 2

Ford:

IAT - B Sensor Intermittent

GM:

Secondary Port Throttle System

Lincoln:

IAT - B Sensor Intermittent

Mercury:

IAT - B Sensor Intermittent

Mini:

Manifold absolute pressure - too high under deceleration

Oldsmobile:

IAT - B Sensor Intermittent

Volkswagen/Audi:

O2 Sensor Circ.,Bank2 - Sensor2 Voltage too Low/Air Leak

Volvo:

O2 Sensor Circ.,Bank2 - Sensor2 Voltage too Low/Air Leak