An automatic transmission needs a certain amount of hydraulic pressure in order to move gears around and propel you down the road. A P0841 DTC means that the transmission fluid pressure sensor which monitors the hydraulic pressure inside of the transmission is not performing according to the preset parameters.
How Serious is the Code?
Having a P0841 diagnostic trouble code is actually pretty serious, and can result in a number of drivability issues like harsh shifts and torque converter problems.
Symptoms of a P0841 include:
- Harsh, delayed or erratic shifts
- Transmission not able to shift gears
- Non-functioning torque converter clutch
- Transmission overheating
- Reduced fuel economy
- Not enough transmission fluid
- Transmission fluid leak
- Dirty transmission fluid / filter
- Damaged wiring/connector
- Failed transmission pump
- Failing torque convertor
- Transmission fluid pressure sensor failure
- Pressure control solenoid failure
- Pressure regulator failure
- Blocked pressure passage
- Valve body issue
- TCM failure
How to Diagnose the Code?
Transmission fluid is one of the most common causes of a P0841 OBDII code, so the level and condition should be assessed. The sensor should be tested, transmission fluid leaks should also be addressed, along with any damaged wiring or connectors on the transmission wiring harness. If that does not solve the problem, further mechanical diagnosis may be needed.
What Repairs Will Fix P0841?
- Change transmission fluid and filter
- Repair leaks
- Repair or replace damaged wiring and connectors
- Replace transmission fluid pressure sensor
- Repair or replace torque converter
- Repair or replace valve body
- Replace transmission pump
- Replace pressure control solenoid
- Replace pressure regulator
- Reprogram or replace TCM