P1909

Set by the manufacturer, so it means different things on different makes. 5 makes in the table below.

More codes than this one? Paste your whole scan

What P1909 means, by make 5 makes

Audi Data bus,ECM 1/2 - no signal from ECM 1
Citroen Trans Temp Sensor Circuit Open or Shorted to Pwr or Gnd
Ford Trans Temp Sensor Circuit Open or Shorted to Pwr or Gnd
Peugeot Trans Temp Sensor Circuit Open or Shorted to Pwr or Gnd
Volkswagen Data bus,ECM 1/2 - no signal from ECM 1

Each line is that manufacturer's own meaning for P1909. They are genuinely different faults, not rewordings of one, so a meaning listed against one make says nothing about the others. If your make is not listed, we do not hold it - your manufacturer's service information is the authority.

Code structure P1909

Powertrain

engine, transmission and emissions

Manufacturer-specific

Defined by the vehicle manufacturer, so the meaning varies between makes.

Fault index

identifies the specific fault

Powertrain Manufacturer-specific

Nearby codes in the P1 range

Manufacturer code meanings from kierandrewett/obd (b56a07a), used under the MIT licence. Copyright (c) Kieran Drewett. SpareRadar is not affiliated with the dataset's authors.