LI27.19-P-080823

Complaint Customers may report one or more of the following:
• Transmission malfunction message
• Check engine light illuminated
• Shifts into N
• Concern disappears after ignition cycle When performing a quick test, the following fault code is stored in Y3/14 - Transmission control for 8-speed dual-clutch transmission (DKG): P056300 The on-board power supply voltage is too high. Cause An overvoltage condition is detected exclusively within the transmission control unit, storing fault P056300 once the measured voltage exceeds 16V. Remedy This LI applies if the freeze frame data for P056300 show a supply voltage between 15.75 to 16.50 volts, and no other control units report overvoltage. (figure 1) Long Term Resolution: Software resolutions are being rolled out for various models. Check validity and ensure your Xentry is updated with latest Addons before continuing: 1. Perform software update for Y3/14 - Transmission control for 8-speed dual-clutch transmission (DKG) - available software listed in Parts 2. Clear fault memory and perform final test drive Short Term Resolution: Please clear faults and perform an extended test drive. The vehicle may be released to the customer until software is available. If the customer complaint matches this LI and the software currently installed on the vehicle is not listed, please submit a TIPS case to the Powertrain inbox with the following information: - Initial Quick Test w/ Freeze Frame Data - DKG Control Unit Log - Latest EEPROM data - Screenshot of software availability