DTC P2721
DTC P2721: A/T Clutch Pressure Control Solenoid Valve D High Input
General Description
A/T clutch pressure control solenoid valve D is used for clutch pressure control. A spool in A/T clutch pressure control solenoid valve D pushes the valve according to the duty cycle that is controlled by the powertrain control module (PCM) (The hydraulic pressure is proportional to the current). The PCM measures the current flowing through A/T clutch pressure control solenoid valve D, and uses feedback control to compensate for the difference between the actual current and the commanded one. If the measured current for the PCM output duty cycle is not within a specified range (circuit short or open), 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 |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [BATTERY VOLTAGE] | 11 V | - |
[ ]: HDS Parameter
Malfunction Threshold
The measured current for the PCM 's command value is as specified here for at least 1 second.
| Duty (%) | Current (A) | Failure mode |
|---|---|---|
| Less than 13.7 | More than 0.6 | High Input |
| 13.7 - 27 | More than 0.9 | High Input |
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.
- A/T clutch pressure control solenoid valve D internal circuit short
- PCM GND1 PG line open
- PCM GND2 LG line open
- PCM internal circuit failure
Confirmation Procedure
Operating Condition
Start the engine, 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.