DTC P0841
DTC P0841: Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance
General Description
The transmission control module (TCM) monitors the conditions of dog clutch A and dog clutch F, and detects abnormal positions of the dog clutches due to hydraulic, electrical, or mechanical failures in the transmission. If the actual dog clutch position and commanded dog clutch current does not match or if dog clutch A and dog clutch F do not actuate to engaged/disengaged position for a specified duration after the engine is started, the TCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | Depending on the driving conditions*, 3 seconds or more** |
| DTC Type | One drive cycle, MIL on, A/T gear position indicator blinks |
*: Symptom 1
**: Symptom 2
Enable Conditions
| Condition | ||
|---|---|---|
| State of the engine | Running | |
Malfunction Threshold
One of these symptoms occurs:
Symptom 1
- Actual dog clutch position and commanded dog clutch current does not match.
Symptom 2
- Dog clutch A and dog clutch F do not actuate to engaged/disengaged position for at least 3 seconds after the engine is started.
Possible Cause
The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Transmission internal failure
- TCM internal failure
Confirmation Procedure
Operating Condition
Start the engine, and wait few seconds.
With the HDS
None.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the A/T gear position indicator blinks, the MIL comes on, and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the TCM memory.
Conditions for clearing the DTC
The A/T gear position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.