DTC Advanced Diagnostics: P0872, P0873
DTC P0872 : Transmission Fluid Pressure Sensor C Circuit Low DTC P0873 : Transmission Fluid Pressure Sensor C Circuit High
General Description
Transmission fluid pressure sensor C is installed on the passage of the hydraulic pressure supplied to clutch C1. The transmission control module (TCM) measures the hydraulic pressure of clutch C1 from the output voltage of transmission fluid pressure sensor C. Transmission fluid pressure sensor C is a strain gauge that changes output voltage depending on the hydraulic pressure change supplied to clutch C1. When the clutch C1 hydraulic pressure is low, the TCM detects a low signal voltage. Conversely, when the clutch C1 hydraulic pressure is high, the TCM detects a high signal voltage. If the transmission fluid pressure sensor C output voltage is a specified voltage for a set time, the TCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration* | 0.45 second or more |
| Duration** | 0.25 second or more |
| DTC Type | One drive cycle, MIL on, shift position indicator blinks |
*: DTC P0872
**: DTC P0873
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [Battery Voltage] | 10 V | - |
| Vehicle | ON mode | |
| Other | No abnormality in sensor supply (VCC2) | |
[ ]: HDS Parameter
Malfunction Threshold
DTC: P0872
The transmission fluid pressure sensor C output voltage is less than 0.25 V for at least 0.45 second.
DTC: P0873
The transmission fluid pressure sensor C output voltage is more than 4.95 V for at least 0.25 second.
Possible Cause
- Solenoid wire harness failure
- Valve body assembly failure (transmission fluid pressure sensor C)
- TCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on, the shift position indicator blinks, and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the TCM memory.
Conditions for clearing the DTC
The shift 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.