# Service bulletin 18\-021\-16 REV. A

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: 10121647
- Published by NHTSA: 2017\-11\-03
- Manufacturer's number: 18\-021\-16 REV. A
- Manufacturer's date: 2016\-07\-08
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN

## NHTSA's summary

Flash: Powertrain Diagnostic And System Enhancements

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2016/MC-10121647-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2016/MC-10121647-0001.pdf)

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

## Components

Transmission and driveline, Automatic transmission, Transmission control module

## Vehicles listed

- 2016 JEEP WRANGLER

## Other bulletins for the same vehicles and component

- [18\-089\-16](/bulletins/10121705.md), 2017-11-03, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest available software. Customers may experience a request from the radio to enter the anti\-theft code causing the radio stay in anti\-theft mode until PCM is flashed. This can result from the battery being disconnected or a dead battery. The following enhancement is included in this software update: · CAN message update to correct VIN message status during ignition initialization.

JSON: [/v1/bulletins/10121647](/v1/bulletins/10121647)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2018-021-16%20REV.%20A&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10121647&vehicle=Service%20bulletin%2018-021-16%20REV.%20A)