P2753 describes an open transmission-fluid-cooler control circuit, while P2755 describes a high circuit condition. Ross-Tech’s VAG references include coolant-control valves and wiring, with documented concerns about coolant migrating through connections on certain applications.
Do not stop at the first affected connector
If contamination is found, the assessment should establish its source and extent using the applicable procedure. Replacing a controller while leaving a leaking component or contaminated harness unresolved can expose the replacement to the same problem.
Include heating complaints, starting faults and communication losses in the report. They may appear unrelated until the wiring findings are considered together. Preserve photographs and identify exactly which connectors were inspected.
Define the repair boundary
Ask which valve, harness and module checks are included. An electronics assessment should receive the contamination history rather than only a removed TCU. Historical campaign information also needs checking against the specific vehicle and market.
AXION can review the supported module and wiring enquiry before postal work is arranged. The P2755 reference adds the circuit-high description. Repair verification should address the original leak or contamination route and the affected functions, not only the fault stored in one controller.
Arrange an assessment
For TCU and DSG assessment, send the vehicle details and fault report to AXION. We support enquiries from drivers and garages. Workshop, postal and remote options depend on the job and are confirmed before booking.
Technical reference
Read the supporting technical documentation. The referenced design or vehicle application defines its scope; it is not a universal repair procedure.
Related reading
VAG P1757 supply faults before transmission-controller replacement. Browse the automotive electronics repair library for other systems and symptoms.