The control module detected an interruption (open circuit) in the Auxiliary Transmission Fluid Pump Motor Supply Voltage circuit, so the expected electrical continuity was not present.
TuningBot DTC Database · v4.37.15
P0B09 Auxiliary Transmission Fluid Pump Motor Supply Voltage Circuit/Open
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P0B09 means
Related and nearby codes
How to read P0B09
Powertrain: engine, transmission and driveline systems.
Generic SAE-standard code: same meaning on every make.
Specific fault index within the subsystem.
Frequently asked questions about P0B09
What does P0B09 mean?
Auxiliary Transmission Fluid Pump Motor Supply Voltage Circuit/Open. The control module detected an interruption (open circuit) in the Auxiliary Transmission Fluid Pump Motor Supply Voltage circuit, so the expected electrical continuity was not present.
Is P0B09 generic or manufacturer-specific?
P0B09 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0B09 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic
