The P0846 trouble code indicates that there’s an issue with the transmission fluid pressure sensor or switch “B” circuit’s range or performance.
P0846 Transmission Fluid Pressure Sensor/Switch “B” Circuit Range/Performance
Code symptoms P0846.
1. Difficulty shifting gears.
2. Slipping or jerking during gear changes.
3. Overheating of the transmission.
4. Illumination of the Check Engine Light (CEL) or Malfunction Indicator Lamp (MIL) on the dashboard.
Causes of the code P0846.
1. Faulty transmission fluid pressure sensor or switch “B”.
2. Loose or corroded wiring or connectors in the sensor circuit.
3. Intermittent short circuits in the sensor circuit.
4. Internal transmission problems.
5. Faulty transmission control module (TCM).
Code Solutions P0846.
1. Replace the transmission fluid pressure sensor or switch “B” if it’s found to be faulty.
2. Repair or replace any damaged wiring or connectors in the sensor circuit.
3. Secure and insulate any wiring harness issues to prevent chafing or rubbing.
4. Check and adjust the transmission fluid level if it’s too high.
5. Address any internal transmission issues if detected.
6. Check and, if necessary, replace the transmission control module (TCM) if other issues are ruled out.