DTC P0847: Transmission Fluid Pressure Sensor/Switch B Circuit Low (DCT)
General Description
The even clutch pressure sensor uses a strain gauge. The output voltage changes depending on the main clutch pressure. The powertrain control module (PCM) sends a 5 V reference voltage to the sensor through a pull-up resistor. When the main clutch pressure is low, the sensor resistance decreases and the PCM detects a low signal voltage. Conversely, when the main clutch pressure is high, the sensor resistance increases and the PCM detects a high signal voltage. If the even clutch pressure sensor signal voltage is a specified voltage for a set time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | 1 second or more |
| DTC Type | One drive cycle, MIL on, A/T gear position indicator blinks |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | |
|---|---|
| Vehicle | ON mode |
| No active DTCs set (prevents monitor from running) | P0848 |
Malfunction Threshold
The even clutch pressure sensor output voltage [Oil pressure sensor 2 voltage.] is less than 0.205 V for at least 1 second.
[ ]: HDS Parameter
Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Even clutch pressure sensor PCL2 line short to ground
- Even clutch pressure sensor VCC line open (includes connector loose connection or disconnection)
- Even clutch pressure sensor failure
- PCM internal circuit failure
Confirmation Procedure
Operating Condition
- 1.
Start the engine.
- 2.
Shift to P position/mode, and wait for at least 1 second.
With the HDS
None.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.
Conditions for clearing the DTC
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 or by disconnecting the 12 volt battery.