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Service bulletin 21-045-20

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)
TypeService bulletin
NHTSA id10181604
Published by NHTSA2020-10-26
Manufacturer's number21-045-20
Manufacturer's date2020-09-11
NHTSA componentPOWER TRAIN

NHTSA's summary

Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience any one of the following: An audible clunk after applying throttle from a coasting condition, predominantly in fifth and sixth gear while driving 48-72 kph (30-45 mph). Poor shift quality or ?bump? experienced during 2-1 coast downs with light brake or no brake applied. Vehicle does not default to automatic drive. Paddle shifters are disabled. "Shift not allowed' displayed in cluster when attempting to upshift while already in 9th gear.

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

Transmission and driveline

Vehicles listed
JEEP CHEROKEE2019

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

Recalls for the same vehicles and component
20262242026-05-07. Powertrain
26V2900002026-05-07. POWER TRAIN
20250122025-01-16. Powertrain
25V0110002025-01-16. POWER TRAIN
18V7390002018-10-19. POWER TRAIN:AUTOMATIC TRANSMISSION
20184222018-08-09. Powertrain
18V4920002018-07-26. POWER TRAIN:AUTOMATIC TRANSMISSION

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
03-001-262026-07-18. Service bulletin. Unable to Complete 01C Recall Drive Cycle C14A7-97 Active Technicians may experience the following: SYMPTOM: ● After performing Recall 01C, the vehicle may get a 'Service AWD' message on the EVIC.
140822026-04-15. Warranty extension. (XX1) Two Speed Power Transfer Unit (PTU) - Select 2017 - 2019 Jeep Cherokee (KL)
140812026-04-15. Warranty extension. (XX1) Two Speed Power Transfer Unit (PTU) - Select 2017 - 2019 Jeep Cherokee (KL)
140792026-04-15. Warranty extension. (XX1) Two Speed Power Transfer Unit (PTU) - Select 2017 - 2019 Jeep Cherokee (KL)
140782026-04-15. Warranty extension. (XX1) Two Speed Power Transfer Unit (PTU) - Select 2017 - 2019 Jeep Cherokee (KL)
1114472026-04-15. Warranty extension. ID-26-19 (XX1) Two Speed Power Transfer Unit (PTU) - Select 2017 - 2019 Jeep Cherokee (KL)
1114322026-04-15. Warranty extension. D-26-10 (XX1) Two Speed Power Transfer Unit (PTU) - Select 2017 - 2019 Jeep Cherokee (KL)
21-027-26 REV. A2026-04-15. Service bulletin. Two Speed Power Transfer Unit Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ? C1494-07 - PTU Fork Position-Mechanincal Failures. Customers m
21-027-262026-04-15. Service bulletin. Two Speed Power Transfer Unit Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ? C1494-07 - PTU Fork Position-Mechanincal Failures. Customers m
S1721000016 REV.B2025-12-23. Service bulletin. Service 4wd Light On, AWD System Service Required Message Illuminated. Diagnostic Trouble Code (DTC) C14A7-97 PTU Motor Component Or System Operation Obstructed Or Blocked.