Service bulletin 2101623

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10241115
Published by NHTSA	2023-08-21
Manufacturer's number	2101623
Manufacturer's date	2023-06-23
NHTSA component	POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM

NHTSA's summary

Flash: Transmission Control Module (TCM) Updates Customer may experience the following: ? Vehicle shifts excessively between gears 1 & 2 in Selec-Speed Control position. This bulletin involves reprogramming the TCM with the latest available software.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Transmission and driveline, Automatic transmission, Transmission control module

Vehicles listed
JEEP GRAND CHEROKEE	2022

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
26V413000	2026-06-30. POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL)

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
S2321000009	2024-01-16. Service bulletin. Malfunction Indicator Lamp (MIL) Illuminated. Active Diagnostic Trouble Code (DTC) P1DB7-00 ? Torque Converter Clutch Performance, Set.
1801323	2024-01-08. Service bulletin. Flash: Powertrain Control Module (PCM) Updates Customers may experience one or more of the following: ? Engine must be started twice to achieve drive ready (at low temperatures around -30°C, -22°F) when the vehicle was entered and started quickly. ??Performance Limited, Service Fuel System? popup while driving. ? Unable to enter electric mode driving while Fuel Oil Refresh Mode (FORM) is active. This bulletin involves reprogramming the PCM with the latest available software NOTE: Additional module flashes are required for this update to be effective, the following modules are all to be updated along with this HCP and AHCP update: ? Transmission Control Module (TCM). ? Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) also known as Power Inverter Module (PIM) module.
S2321000009	2024-01-08. Service bulletin. MIL On with TCM P1DB7 Active
S2321000005	2024-01-08. Service bulletin. Transmission Fluid Leak From Under The Vehicle.
S2321000009	2023-10-30. Service bulletin. MIL On with TCM P1DB7 Active
S2321000005	2023-10-30. Service bulletin. Transmission Fluid Leak From Under The Vehicle.
1801323	2023-10-02. Service bulletin. Flash: Powertrain Control Module (PCM) Updates Customers may experience one or more of the following: ? The engine oil life displayed on Instrument Panel Cluster (IPC) drops down too fast when the engine oil dilution reaches high level without the ability to recover. ? Incorrect reporting of fuel tank high pressure sensor value on wiTECH and Freeze Frame. ? The fuel door will get locked in the event of a leak failure. ? Engine must be started twice to achieve drive ready (at low temperatures around -30°C, -22°F) when the vehicle was entered and started quickly. ? ?Performance Limited, Service Fuel System? popup while driving. ? Unable to enter electric mode driving while Fuel Oil Refresh Mode (FORM) is active. This bulletin involves reprogramming the PCM with the latest available software. NOTE: Additional module flashes are required for this update to be effective, the following modules are all to be updated along with this HCP and AHCP update: ? Transmission Control Module (TCM). ? Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) also known as Power Inverter Module (PIM) module.
2101523	2023-08-21. Service bulletin. Flash: Transmission Control Module (TCM) Updates Customer may experience the following: ? Vehicle shifts excessively between gears 1 & 2 in Selec-Speed Control position. This bulletin involves reprogramming the TCM with the latest available software.
S2225000003	2023-01-09. Service bulletin. P0513-Invalid Skim Key setting in the PCM after programming a replacement ?generic? PCM
9100063	2022-11-07. Service bulletin. PCM If you are replacing a PCM in this vehicle, please review SOL S2225000003 for detailed programming instructions. Failure to follow instructions may result in an unresponsive PCM and cannot be recovered.