DTC codes / Volkswagen codes / P1828
P1828 on Volkswagen vehicles indicates that the transmission control module (TCM) has detected an electrical fault in the circuit for pressure control solenoid 4, which is one of the solenoids inside the valve body that regulates hydraulic pressure for gear shifts. The TCM monitors the solenoid's electrical current and voltage and sets this code when the readings fall outside the expected range, pointing to an open circuit, short circuit, or faulty solenoid.
Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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