P186D - High Side 1 System Voltage Low Range Out

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU)
  • TC-SST-ECU harness is open or shorted
  • TC-SST-ECU circuit poor electrical connection

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P186d Description

The Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU) monitors the system and the voltage of the high side 1 circuit is determined to be too low.
OBDII Code P186d - High Side 1 System Voltage Low Range Out - AutoCodes.com

P186D Information for specific makes

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