P1819 OBD Code Definition:
Transmission Range Switch, Signals ‘A/B/C &P’ – Signal Variation
P1819 OBD Code Description:

Possible Causes

• Wiring from/to Pressure Control Valve 2 Open/Short to Ground
• 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.