Service bulletin 18-044-20

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)
Type	Service bulletin
NHTSA id	10176581
Published by NHTSA	2020-06-22
Manufacturer's number	18-044-20
Manufacturer's date	2020-05-16
NHTSA component	FUEL SYSTEM, GASOLINE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM

NHTSA's summary

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience one or more of the following conditions: Intermittent Engine Stop/Start (ESS) operation (Sales Code ECL only). Reduced battery life (Sales Code ECL only). Hard or no start condition (under certain conditions after the fuel tank has been filled with a different fuel type). False low oil pressure lamp illuminated in the cluster. A hard or no start condition when using only E22 fuel. Oil change message was displayed at the wrong time. When Adaptive Cruise Control (ACC) is illuminated, the normal cruise control active message is displayed (Sales Code NHZ). Additional enhancement included in this software: Alternator Smart Charging calibration improvements.

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, Engine, Fuel system, Transmission and driveline, Automatic transmission, Transmission control module

Vehicles listed
JEEP COMPASS	2017, 2018

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

Other bulletins for the same vehicles and component
1809820	2022-10-17. Service bulletin. Flash: Powertrain Control Module (PCM) Updates - AN-M4-20200919 Refer to China Joint Venture (JV) released document AN-M4-20200919 for details on this service action.
9003753	2022-10-17. Service bulletin. Powertrain Control Module Customer may experience a MIL-on condition with a P0607 - ECU INTERNAL PERFORMANCE fault in the Powertrain Control Module (PCM). This fault may occur due to a software anomaly and a combination of actions taken by the driver. DO NOT REPLACE THE PCM AT THIS TIME. Please erase the fault and return the vehicle to the customer. A resolution for this condition is under development.
1806817	2022-10-17. Service bulletin. This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software.
1803817	2022-10-17. Service bulletin. This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software.
W84	2022-09-26. Service bulletin. Customer Satisfaction Notification W84 Powertrain Software Update
18-098-20	2020-11-30. Service bulletin. Flash: Powertrain Control Module (PCM) Updates - AN-M4-20200919 Refer to China Joint Venture (JV) released document AN-M4-20200919 for details on this service action.
18-080-19	2019-12-02. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience excessive oil consumption between oil change intervals.
18-072-19	2019-12-02. Service bulletin. Flash: Powertrain Control Module (PCM) Updates - AN-M4-18-20191010 Refer to China Joint Venture (JV) released document AN-M4-18-20191010, for details on this service action.
21-024-19	2019-07-15. Service bulletin. Flash: Transmission Control Module (TCM) Update This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. Customers may experience the following: Malfunction Indicator Lamp (MIL) illumination, Electronic Vehicle Information Center (EVIC) message states ?Service Transmission? and transmission intermittently goes into neutral with PRNDL flashing when vehicle is stopped. The vehicle may or may not resume normal transmission operation after cycling the shifter or ignition. Customer may notice poor shift quality before engine/trans has reached normal operating temperature.
21-023-19	2019-07-15. Service bulletin. Flash: Transmission Control Module (TCM) Update This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the following: Malfunction Indicator Lamp (MIL) illumination, Electronic Vehicle Information Center (EVIC) message states ?Service Transmission? and transmission intermittently goes into neutral with PRNDL flashing when vehicle is stopped. The vehicle may or may not resume normal transmission operation after cycling the shifter or ignition. Immediate Autostart after Autostop (without releasing the brake pedal).