Communication with automatic gearbox ECU fault : Value received incorrect
PSA · transmission
Data confidence72%
The control module detected that the value received for the Communication with automatic gearbox ECU fault over the network was incorrect. Documented for the Automated manual gearbox electric control ECU on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Applies toPeugeotAutomated manual gearbox electric control ECU
U1209
Fault : absence of communication with the automatic gearbox ECU : Data invalid
PSA · transmission
Data confidence72%
The control module detected the fault condition "Data invalid" for the Fault. Documented for the Bosch ESP 8.1 stability control ECU on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Applies toPeugeotBosch ESP 8.1 stability control ECU
U1209
CAN network : Communication fault with the gearbox ECU
PSA · transmission
Data confidence72%
The control module detected the fault condition "Communication fault with the gearbox ECU" for the CAN network. Documented for the Bosch MED 17.4.x engine ECU (EP6 THP family) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Applies toPeugeotBosch MED 17.4.x engine ECU (EP6 THP family)
U1209
Intersystems CAN : One of the parameters present in a datastream sent by the Gearbox is invalid
PSA · transmission
Data confidence72%
The control module detected an internal control-unit fault (One of the parameters present in a datastream sent by the Gearbox is invalid). Documented for the Continental SID 807 injection ECU (DV6C 1.6 HDi) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Intersystem CAN network : One of the parameters present in a frame emitted by the gearbox ECU is invalid
PSA · transmission
Data confidence72%
The control module detected an internal control-unit fault (One of the parameters present in a frame emitted by the gearbox ECU is invalid). Documented for the Delphi DCM 3.5 injection ECU (DW10C 2.0 HDi) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Dialogue with the automatic gearbox : Value received incorrect
PSA · transmission
Data confidence72%
The control module detected that the value received for the Dialogue with the automatic gearbox over the network was incorrect. Documented for the Magneti Marelli MM6KP engine ECU (EW7A/EW10A) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Manufacturer-defined range: the meaning can differ between brands.
209
Specific fault index within the subsystem.
Frequently asked questions about U1209
What does U1209 mean?
Diagnostic Trouble Code (6 interpretations). The control module detected that the value received for the Communication with automatic gearbox ECU fault over the network was incorrect. Documented for the Automated manual gearbox electric control ECU on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Is U1209 generic or manufacturer-specific?
U1209 is a manufacturer-specific code. In this database it is documented for: PSA. The same number can mean something different on other brands.
Can TuningBot remove U1209 at file level?
Not guaranteed. Powertrain (P) codes can be reliably disabled in the ECU calibration, but body, chassis and network codes depend on the specific control unit and how the fault is implemented - some can be handled, some cannot. Ask for a quote and our engineers will check your file and tell you, free of charge, whether U1209 is removable in your case.
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