The P0862 code in your 2023 Dodge Charger indicates the transmission control module (TCM) communication circuit is showing higher voltage than expected. This affects the CAN bus communication between the TCM and other vehicle systems.
Understanding High Communication Voltage
The Charger's CAN bus operates at specific voltage levels. High voltage on the TCM communication circuit typically indicates an open circuit or short to power affecting the network.
Common Causes of P0862
- Open circuit in CAN bus wiring
- Short to battery voltage
- TCM internal circuit failure
- Disconnected CAN bus connector
- Terminating resistor issues
- Module power supply problems
Symptoms of High Communication Voltage
- TCM not communicating with PCM
- Check engine light on
- Transmission in failsafe mode
- Multiple system errors
- Gauge cluster issues
- Vehicle may not start properly
Charger Performance Implications
The Charger's transmission relies on network communication for adaptive shifting, performance modes, and traction integration. P0862 can significantly affect drivability.