# Service bulletin 21\-018\-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.

- Type: Service bulletin
- NHTSA id: 10175137
- Published by NHTSA: 2020\-05\-18
- Manufacturer's number: 21\-018\-20
- Manufacturer's date: 2020\-03\-07
- NHTSA component: ELECTRICAL SYSTEM; POWER TRAIN

## NHTSA's summary

Flash: Transmission Control Module \(TCM\) Updates This bulletin involves reprogramming the TCM with the latest available software. Customer may experience a undesirable or long 5\-4 shift during a vehicle coast\-down.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10175137-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10175137-9999.pdf)

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

## Components

Electrical system, Transmission and driveline

## Vehicles listed

- 2017 to 2018 JEEP CHEROKEE

## Recalls for the same vehicles and component

- [2025012](/recalls/tc/2025012.md), 2025-01-16: Powertrain
- [25V011000](/recalls/nhtsa/25V011000.md), 2025-01-16: POWER TRAIN
- [2023254](/recalls/tc/2023254.md), 2023-04-27: Powertrain
- [23V302000](/recalls/nhtsa/23V302000.md), 2023-04-27: POWER TRAIN:AUTOMATIC TRANSMISSION
- [2020261](/recalls/tc/2020261.md), 2020-06-12: Powertrain
- [20V343000](/recalls/nhtsa/20V343000.md), 2020-06-11: POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT; POWER TRAIN:AUTOMATIC TRANSMISSION
- [2018422](/recalls/tc/2018422.md), 2018-08-09: Powertrain
- [18V524000](/recalls/nhtsa/18V524000.md), 2018-08-09: ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD
- [2018392](/recalls/tc/2018392.md), 2018-07-27: Powertrain
- [18V494000](/recalls/nhtsa/18V494000.md), 2018-07-26: POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT

## Other bulletins for the same vehicles and component

- [08\-292\-26](/bulletins/11035316.md), 2026-07-29, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. Unable To Clear C1494\-07 And C14A9\-00 After 45A Recall Technicians may experience the following: SYMPTOM: ● wiTECH displays a mismatch error after performing recall 45A.
- [03\-002\-26](/bulletins/11035039.md), 2026-07-18, Service bulletin: ENGINE; ELECTRICAL SYSTEM. Stop/Start Illuminated, 0x22 During Fork Wear Routine Technicians may experience the following: SYMPTOM: ● Negative response 0X22 after Recall 01C flash triggers one or more communication codes with controllers.
- [03\-001\-26](/bulletins/11035038.md), 2026-07-18, Service bulletin: POWER TRAIN. 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.
- [S2523000003 REV.A](/bulletins/11031688.md), 2026-04-29, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. Door Latch, Handle And Ajar Additional Service Information.
- [14082](/bulletins/11031348.md), 2026-04-15, Warranty extension: POWER TRAIN. \(XX1\) Two Speed Power Transfer Unit \(PTU\) \- Select 2017 \- 2019 Jeep Cherokee \(KL\)
- [14081](/bulletins/11031347.md), 2026-04-15, Warranty extension: POWER TRAIN. \(XX1\) Two Speed Power Transfer Unit \(PTU\) \- Select 2017 \- 2019 Jeep Cherokee \(KL\)
- [14079](/bulletins/11031346.md), 2026-04-15, Warranty extension: POWER TRAIN. \(XX1\) Two Speed Power Transfer Unit \(PTU\) \- Select 2017 \- 2019 Jeep Cherokee \(KL\)
- [14078](/bulletins/11031345.md), 2026-04-15, Warranty extension: POWER TRAIN. \(XX1\) Two Speed Power Transfer Unit \(PTU\) \- Select 2017 \- 2019 Jeep Cherokee \(KL\)
- [111447](/bulletins/11031344.md), 2026-04-15, Warranty extension: POWER TRAIN. ID\-26\-19 \(XX1\) Two Speed Power Transfer Unit \(PTU\) \- Select 2017 \- 2019 Jeep Cherokee \(KL\)
- [111432](/bulletins/11031343.md), 2026-04-15, Warranty extension: POWER TRAIN. D\-26\-10 \(XX1\) Two Speed Power Transfer Unit \(PTU\) \- Select 2017 \- 2019 Jeep Cherokee \(KL\)

JSON: [/v1/bulletins/10175137](/v1/bulletins/10175137)

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