# Service bulletin 21\-017\-25

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: 11015515
- Published by NHTSA: 2025\-03\-11
- Manufacturer's number: 21\-017\-25
- Manufacturer's date: 2025\-03\-04
- NHTSA component: POWER TRAIN
- Manufacturer's system: Transmission Control Module

## NHTSA's summary

Flash: Transmission Control Module \(TCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P0300 \- Multiple Cylinder Misfire. NOTE: DTC P0300 will be set in the Powertrain Control Module \(PCM\). No DTCs will be stored in the TCM. Customers may also experience the following: ● Rough running engine.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11015515-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11015515-9999.pdf)

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

## Components

Transmission and driveline

## Trouble codes named

P0300

## Vehicles listed

- 2022 JEEP GRAND WAGONEER
- 2022 JEEP WAGONEER

## Other bulletins for the same vehicles and component

- [18\-068\-26](/bulletins/11035176.md), 2026-07-23, Service bulletin: POWER TRAIN. Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● \*\*U0405\-00 \- Invalid Data Received From Cruise Control Module. ● U0104\-00 \- Lost Communication With Cruise Control Module. NOTE: Vehicles setting DTCs U0405\-00 and U0104\-00 may experience an inability to be cleared.\*\* ● P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking. ● P06DD\-00 \- Engine Oil Pressure Control Circuit Stuck Off. ● P0604\-00 \- Internal Control Module Random Access Memory Ram Error. ● P060C\-00 \- Internal Control Module Main Processor Performance. This bulletin involves reprogramming the PCM with the latest available software.
- [S2621000003 REV.A](/bulletins/11030138.md), 2026-03-18, Service bulletin: POWER TRAIN. The vehicle will exhibit a service transmission/check engine warning indicator for the following transmission models: 845RE, 8HP45, 850RE, 8HP50, 8HP70, 8HP75, 8HP75\-PHEV, 8HP75\-LCV, 8HP90, 8HP95. Transmissions may exhibit the following diagnostic codes: P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
- [S2621000003](/bulletins/11029770.md), 2026-03-05, Service bulletin: POWER TRAIN. Service transmission/check engine warning indicator for the 850RE, 8HP50, 8HP70, 8HP75, 8HP75\-PHEV transmissions that have fault codes P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
- [21\-029\-25 REV. A](/bulletins/11020637.md), 2025-07-09, Service bulletin: POWER TRAIN. 8HP75 D Clutch Repair Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must have at least 11,265 km \(7,000 mi.\) and exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0733\-00 \- Gear 3 Shift Incorrect Ratio. ● P1DA8\-00 \- Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92\-00 \- Incorrect Gear Ratio \- Clutch 4 Defective. Customers may also comment on the following: ● Vehicle enter limp home mode. This bulletin involves replacing the D clutch.
- [21\-009\-25 REV. C](/bulletins/11020636.md), 2025-07-09, Service bulletin: POWER TRAIN. 850RE D Clutch Repair Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must have at least 11,265 km \(7,000 mi.\) and exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0733\-00 \- Gear 3 Shift Incorrect Ratio. ● P1DA8\-00 \- Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92\-00 \- Incorrect Gear Ratio \- Clutch 4 Defective. Customers may also comment on one or more of the following: ● Transmission slips when shifting. ● Vehicle will not move in reverse. ● Vehicle will not shift higher than third gear This bulletin involves replacing the D clutch.
- [18\-024\-25](/bulletins/11017979.md), 2025-05-06, Service bulletin: POWER TRAIN. "Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set: ● \*\*U0104 \- Lost Communication with Cruise Control Module.\*\* ● P00C6 \- Fuel Rail Pressure Too Low \- Engine Cranking Bank 1. ● P06DD \- Engine Oil Pressure Control Circuit Performance/Stuck Off. ● P0604\-00 \- Internal Control Module Random Access Memory Ram Error. ● P060C\-00 \- Internal Control Module Main Processor Performance. This bulletin involves reprogramming the PCM with the latest available software. "
- [S2518000004](/bulletins/11017871.md), 2025-05-06, Service bulletin: POWER TRAIN. Mil\-On/Check Engine Lamp\-On
- [21\-029\-25](/bulletins/11016884.md), 2025-04-09, Service bulletin: POWER TRAIN. "D Clutch Repair Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must have at least 11,265 km \(7,000 mi.\) and exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0733\-00 \- Gear 3 Shift Incorrect Ratio. ● P1DA8\-00 \- Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92\-00 \- Incorrect Gear Ratio \- Clutch 4 Defective. Customers may also comment on the following: ● Vehicle enter limp home mode. This bulletin involves replacing the D clutch."
- [21\-009\-25 REV. B](/bulletins/11016879.md), 2025-04-08, Service bulletin: POWER TRAIN. "850RE D Clutch Repair \*\*Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must have at least 11,265 km \(7,000 mi.\) and exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\):\*\* ● P0733\-00 \- Gear 3 Shift Incorrect Ratio. ● P1DA8\-00 \- Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92\-00 \- Incorrect Gear Ratio \- Clutch 4 Defective. Customers may also comment on one or more of the following: ● Transmission slips when shifting. ● Vehicle will not move in reverse. ● Vehicle will not shift higher than third gear This bulletin involves replacing the D clutch."
- [9100390 Rev 1](/bulletins/11015811.md), 2025-03-19, Service bulletin: POWER TRAIN. "D Clutch Repair Kit For transmission concerns related to DTCs P0733\-00, P1DA8\-00, and/or P1D92\-00, a repair is available, and transmission replacement is NOT required. Please reference TSB 21\-009\-25 Rev. A, for details on D\-clutch replacement. Please also note, fluid color/condition/odor is NOT an indicator of transmission health and should not be used as the reason for unit replacement. Complete unit replacements instead of repairs for these DTCs may be subject to chargeback."

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