The P0842 trouble code indicates that the transmission fluid pressure sensoror switch “A” circuit is reporting a low voltage condition.
P0842 Transmission Fluid Pressure Sensor/Switch “A” Circuit Low
Code symptoms P0842.
1. Difficulty shifting gears.
2. Transmission 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 P0842.
1. Faulty transmission fluid pressure sensor or switch.
2. Low transmission fluid level or dirty fluid.
3. Damaged or corroded wiring or connectors in the sensor circuit.
4. Internal transmission problems.
5. Faulty transmission control module (TCM).
Code Solutions P0842.
1. Replace the transmission fluid pressure sensor orswitch if it’s found to be faulty.
2. Repair or replace any damaged wiring or connectors in the sensor circuit.
3. Ensure the transmission fluid level is correct and the fluid is clean. If necessary, perform a transmission fluid flush and refill.
4. Address any internal transmission issues if detected.
5. Check and, if necessary, replace the transmission control module (TCM) if other issues are ruled out.