DTC P2857 (2016 2017 2018 2019 2020)
DTC P2857 : Clutch Pressure Regulator Low Current
- Before you troubleshoot, review the General Troubleshooting Information .
- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
- The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P2857 Clutch Pressure Regulator Low Current |
DTC (A/T)
- Problem verification
-1. Turn the vehicle to the ON mode.
- 2. Clear the DTC with the HDS.
- 3. Turn the vehicle to the OFF (LOCK) mode.
- 4. Turn the vehicle to the ON mode, and wait for several seconds.
- 5. Check for Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame P2857 Clutch Pressure Regulator Low Current Is DTC P2857 indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals between the sensor unit and the TCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.
- Open wire check (LSA, LSB, LSC, LSD, VBSOL2 lines)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connectors.
TCM subharness 26P connector TCM 58P connector - 3. Check for continuity between test points 1 and 2 individually.
Test condition Vehicle OFF (LOCK) mode TCM subharness 26P connector: disconnected TCM 58P connector: disconnected Test point 1 TCM subharness 26P connector No. 3 Test point 2 TCM 58P connector No. 54 Test point 1 TCM subharness 26P connector No. 4 Test point 2 TCM 58P connector No. 6 Test point 1 TCM subharness 26P connector No. 5 Test point 2 TCM 58P connector No. 55 Test point 1 TCM subharness 26P connector No. 6 Test point 2 TCM 58P connector No. 40 Test point 1 TCM subharness 26P connector No. 7 Test point 2 TCM 58P connector No. 53 Is there continuity?
YES
The LSA, LSB, LSC, LSD, and VBSOL2 wires are not open. Go to step 3.
NO
Repair an open in the LSA, LSB, LSC, LSD, and/or VBSOL2 wire between the sensor unit and the TCM.
- Shorted wire check (LSA, LSB, LSC, LSD, VBSOL2 lines)
-1. Check for continuity between the following test points and body ground individually.
Test condition Vehicle OFF (LOCK) mode TCM subharness 26P connector: disconnected TCM 58P connector: disconnected Connector Terminal TCM 58P connector No. 6 No. 40 No. 53 No. 54 No. 55 Is there continuity?
YES
Repair a short to ground in the LSA, LSB, LSC, LSD, and/or VBSOL2 wire between the sensor unit and the TCM.
NO
The LSA, LSB, LSC, LSD, and VBSOL2 wires are OK. Update the TCM if it does not have the latest software , or substitute a known-good TCM , then recheck. If this DTC goes away and the TCM was updated, troubleshooting is complete. If this DTC goes away and the TCM was substituted, replace the original TCM .