# Service bulletin TSB\_TRA112

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11023106
- Published by NHTSA: 2025\-09\-12
- Manufacturer's number: TSB\_TRA112
- Manufacturer's date: 2025\-09\-09
- NHTSA component: POWER TRAIN
- Manufacturer's system: TRA

## NHTSA's summary

TECHNICAL SERVICE BULLETIN: TRANSAXLE ASSEMBLY REPLACEMENT \& HCU LOGIC IMPROVEMENT \- This bulletin provides information to replace the transaxle assembly and upgrade the Hybrid Control Unit Low\-Voltage DC Converter \(HCULDC\) software on some 2022\-2024MY Sorento Plug\-In Hybrid \(MQ4 PHEV\) vehicles equipped with a 1.6L T\-GDI engine and All\-Wheel Drive \(AWD\), produced from June 29, 2021 through January 10, 2024. Some vehicles may experience an illuminated Malfunction Indicator Lamp \(MIL\) with DTC P0C4E00 stored, accompanied by a rough transition when the vehicle switches between EV and HEV motive power.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023106-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023106-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline

## Trouble codes named

P0C4E

## Vehicles listed

- 2022 to 2024 KIA SORENTO PHEV

## Recalls for the same vehicles and component

- [2022580](/recalls/tc/2022580.md), 2022-10-12: Powertrain
- [22V760000](/recalls/nhtsa/22V760000.md), 2022-10-11: POWER TRAIN:AUTOMATIC TRANSMISSION

## Other bulletins for the same vehicles and component

- [TSB\_TRA046\_R5](/bulletins/11017172.md), 2025-04-23, Service bulletin: POWER TRAIN. TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, and the transmission oil cooler is transferred to the new transmission.
- [TSB\_TRA111\_R2](/bulletins/11010702.md), 2024-11-21, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. TECHNICAL SERVICE BULLETIN: 8\-SPEED DUAL CLUTCH TRANSMISSION EOP SENSORLESS LOGIC IMPROVEMENT \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to improve the Electric Oil Pump ‘EOP’ operation logic of the automatic transmission ‘A/T’ on some 2021\-2023MY Sorento \(MQ4a\) vehicles produced from September 9, 2020 through December 29, 2023 and 2021\-2023MY K5 \(DL3a\) vehicles produced from March 24, 2020 to December 18, 2023, equipped with a 2.5L T\-GDI Theta III engines and 8\-Speed Dual Clutch Transmissions \(DCT\). The affected vehicles may exhibit abnormal/harsh shifting, gear slipping, no gear engagement in Drive ‘D’ and/or Reverse ‘R’ shift selection, accompanied by a Malfunction Indicator Lamp \(MIL\) ‘ON’ illuminated on the instrument cluster with DTC\(s\) P1C2D03, P1C2D1C, and/or P1C2E92 stored.
- [TSB\_TRA111\_R1](/bulletins/11006664.md), 2024-08-29, Service bulletin: POWER TRAIN. TECHNICAL SERVICE BULLETIN: 8\-SPEED DUAL CLUTCH TRANSMISSION EOP SENSORLESS LOGIC IMPROVEMENT \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to improve the Electric Oil Pump ‘EOP’ operation logic of the automatic transmission 'A/T’ on some 2021\-2023MY Sorento \(MQ4a\) vehicles produced from September 9, 2020 through December 29, 2023 and 2021\-2023MY K5 \(DL3a\) vehicles produced from March 24, 2020 to December 18, 2023, equipped with a 2.5L T\-GDI Theta III engines and 8\-Speed Dual Clutch Transmissions \(DCT\). The affected vehicles may exhibit abnormal/harsh shifting, gear slipping, no gear engagement in Drive ‘D’ and/or Reverse ‘R’ shift selection, accompanied by a Malfunction Indicator Lamp \(MIL\) ‘ON’ illuminated on the instrument cluster with DTC\(s\) P1C2D03, P1C2D1C, and/or P1C2E92 stored.
- [TSB\_TRA111](/bulletins/11005430.md), 2024-08-01, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. TECHNICAL SERVICE BULLETIN: 8\-SPEED DUAL CLUTCH TRANSMISSION EOP SENSORLESS LOGIC IMPROVEMENT \- This bulletin provides information to improve the Electric Oil Pump ‘EOP’ operation logic of the automatic transmission ‘A/T’ on some 2021\-2023MY Sorento \(MQ4a\) vehicles produced from September 9, 2020 through December 29, 2023 and 2021\-2023MY K5 \(DL3a\) vehicles produced from March 24, 2020 to December 18, 2023, equipped with a 2.5L T\-GDI Theta III engines and 8\-Speed Dual Clutch Transmissions \(DCT\).
- [TSB\_TRA046\_R4](/bulletins/11000787.md), 2024-06-04, Service bulletin: POWER TRAIN. This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced.
- [TSB\_TRA108\_R1](/bulletins/10253812.md), 2024-05-06, Service bulletin: POWER TRAIN. TECHNICAL SERVICE BULLETIN: 4WD COUPLING ACTUATOR ASSEMBLY REPLACEMENT \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to replace the AWD coupling actuator assembly on some 2021\-2024MY Kia AWD models listed on page 4. The affected vehicles may exhibit an inoperative AWD system \(also referred to as 4WD\) capability concern which may be caused by abnormal wear of the motor brushes inside the actuator assembly. This condition will cause the warning lamps on the instrument cluster to illuminate with stored DTC\(s\) P195800 and/or P19600.
- [TSB\_TRA105\_R1](/bulletins/10253007.md), 2024-05-06, Service bulletin: POWER TRAIN. TECHNICAL SERVICE BULLETIN: 4WD COUPLING NOISE INSPECTION AND SNAP RING REPLACEMENT \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to inspect for a knocking/clicking noise present in the rear of the vehicle during low\-speed driving \(25MPH or less\) on some 2020\-2022MY Kia vehicles equipped with All Wheel Drive \(AWD\). The 4WD coupling snap ring may have excessive play between the drive gear set shaft and coupling flange.
- [TSB\_TRA105](/bulletins/10245266.md), 2023-12-05, Service bulletin: POWER TRAIN. TECHNICAL SERVICE BULLETIN: 4WD COUPLING NOISE INSPECTION AND SNAP RING REPLACEMENT \- This bulletin provides information to inspect for a knocking/clicking noise present in the rear of the vehicle during low\-speed driving \(25MPH or less\) on some 2020\-2022MY Kia vehicles equipped with All Wheel Drive \(AWD\). The 4WD coupling snap ring may have excessive play between the drive gear set shaft and coupling flange.
- [TSB\_TRA108](/bulletins/10242937.md), 2023-10-01, Service bulletin: POWER TRAIN. TECHNICAL SERVICE BULLETIN: 4WD COUPLING ACTUATOR ASSEMBLY REPLACEMENT \- This bulletin provides information to replace the AWD coupling actuator assembly on some 2021\-2023MY Kia AWD models listed on page 4. The affected vehicles may exhibit an inoperative AWD system \(also referred to as 4WD\) capability concern which may be caused by abnormal wear of the motor brushes inside the actuator assembly. This condition will cause the warning lamps on the instrument cluster to illuminate with stored DTC\(s\) P195800 and/or P19600.
- [PS750](/bulletins/10242913.md), 2023-10-01, Service bulletin: POWER TRAIN; STEERING; SUSPENSION. PITSTOP: AWD SYSTEM CONCERN DUE TO TIRE CIRCUMFERENCE \- This Pitstop provides information regarding potential concerns with the All\-Wheel\-Drive \(AWD\) system due to tire sizes of differing circumference. Some customers may complain of a chatter sensation felt in the drivetrain of the vehicle and/or the failure of drivetrain component\(s\). A difference in tire size \(width, aspect ratio, construction, rim diameter etc.\) may be the cause.

JSON: [/v1/bulletins/11023106](/v1/bulletins/11023106)

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