TuningBot DTC Database · v4.37.15
Manufacturer-specific interpretation for PSA. All interpretations of U1109
The control module detected that the expected Communication with automatic gearbox ECU fault was absent. Documented for the Automated manual gearbox electric control ECU on Peugeot applications; the same PSA control units are also fitted to Citroën models.
The control module detected that the expected Fault was absent. Documented for the Bosch ESP 8.1 stability control ECU on Peugeot applications; the same PSA control units are also fitted to Citroën models.
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.
The control module detected the fault condition "No communication with the gearbox ECU (Automatic or Electronic)" for the Intersystems CAN. 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.
The control module detected the fault condition "Loss of communication with the gearbox ECU (automatic or piloted manual)" for the Intersystem CAN network. 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.
The control module detected the fault condition "No communications with the auto gearbox" for the Dialogue with the automatic gearbox. Documented for the Magneti Marelli MM6KP engine ECU (EW7A/EW10A) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Network: communication between control units.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Diagnostic Trouble Code (6 interpretations). The control module detected that the expected Communication with automatic gearbox ECU fault was absent. Documented for the Automated manual gearbox electric control ECU on Peugeot applications; the same PSA control units are also fitted to Citroën models.
U1109 is a manufacturer-specific code. In this database it is documented for: PSA. The same number can mean something different on other brands.
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 U1109 is removable in your case.
Understand the system behind this code: Diagnostic Strategy and DTC Logic
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