P1820 OBD Code Definition:
Transmission Range Switch, Signals ‘A’ – Voltage Low
P1820 OBD Code Description:
Possible Causes
- Wiring from/to Pressure Control Valve 2 Short to Plus
- Pressure Control Valve 2 faulty
Possible Solutions
- Check Wiring from/to Pressure Control Valve 2
- Check Pressure Control Valve 2
- Check Measuring Blocks
Special Notes
- Pressure Control Valve 2 might be referred to as Solenoid Valve 5
- Start with checking connectors for corrosion or water damage, in case of 01V transmission pay special attention to 16-pin connector between valve body and wiring harness.