Service bulletin 21-003-16

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	10121912
Published by NHTSA	2017-11-03
Manufacturer's number	21-003-16
Manufacturer's date	2016-01-06
NHTSA component	POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN; ELECTRICAL SYSTEM

NHTSA's summary

Flash: Transmission Diagnostic And Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience the following: · Poor shift quality.

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
CHRYSLER 200	2016

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
S2325000007	2024-01-08. Service bulletin. MIL/check engine lamp comes on after performing U90 recall PCM software update.
S2325000007	2023-10-30. Service bulletin. MIL/check engine lamp comes on after performing U90 recall PCM software update.
04753183A	2022-09-15. Service bulletin. Transmission, Oil Pump, Torque Convertor, and Flexplate
18-081-15	2019-05-20. Service bulletin. Flash: 3.6L Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Codes (DTCs) set in the PCM memory: ? U0402 - Implausible Data Received From TCM. ? P0480 - Cooling Fan 1 Control Circuit/Open.
18-051-16	2018-06-04. Service bulletin. Flash: 2.4L Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Codes (DTCs) set in the PCM memory: · **P0101 - Mass Air Flow Sensor "A" Circuit Performance. · P050D - Cold Start Rough Idle. · P0335 - Crankshaft Position Sensor Circuit. · P2610 - PCM Internal Engine Off Timer Performance. · P1607 - PCM Internal Shutdown Timer Rati · U0402 - Implausible Data Received From TCM. · U1424 - Implausible Engine Torque Signal Received. · P0456 - EVAP System Small Leak. · P0480 - Cooling Fan 1 Control Circuit/Open. In addition, the customers may experience the following: · A slight bump may be felt during the 4-5 shift, under light acceleration.
18-052-16 REV. A	2018-05-14. Service bulletin. Flash: 3.6L Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Codes (DTCs) set in the PCM memory: · U1424-00 - Implausible Engine Torque Signal Received. · P0335 - Crankshaft Position Sensor Circuit. · U0402 - Implausible Data Received From TCM - (Transmission Control Module). · P0480 - Cooling Fan 1 Control Circuit/Open. In addition, the following software enhancement is available: · Elimination of (disable) Low idle 550 RPM to mitigate rough idle complaints (Base idle fully warm maintained at 648 RPM).
21-002-16	2017-11-03. Service bulletin. Flash: Transmission Diagnostic And Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience the following: · Poor shift quality.
18-051-16 REV. A	2017-11-03. Service bulletin. Flash: 2.4L Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DTCs set in the PCM memory: · P1185 - General Pressure Sensor Correlation. · P0101 - Mass Air Flow Sensor "A" Circuit Performance. · P050D - Cold Start Rough Idle. · P0335 - Crankshaft Position Sensor Circuit. · P2610 - PCM Internal Engine Off Timer Performance. P1607 - PCM Internal Shutdown Timer Rationality. · P0133 - O2 Sensor 1/1 Slow Response. · U0402 - Implausible Data Received From TCM. · U1424 - Implausible Engine Torque Signal Received. · P0456 - EVAP System Small Leak. · P0480 - Cooling Fan 1 Control Circuit/Open. In addition, software enhancements include: · Improvement to 4-5 upshift.
03-003-16	2016-10-14. Service bulletin. "DRIVETRAIN CONTROL MODULE (DTCM) THIS BULLETIN INVOLVES REPLACING AND RECONFIGURING THE DRIVETRAIN CONTROL MODULE (DTCM) WITH THE LATEST AVAILABLE SOFTWARE. SOME VEHICLES MAY EXPERIENCE A CONSTANT HIGH PITCHED WHINE COMING FROM REAR AXLE AREA."
21-003-16 REV. A	2016-07-14. Service bulletin. SYMPTOM/CONDITION: A small number of customers may experience the following: • Slow 5-4 downshift. • Poor shift quality. The following enhancements are included in this software update: • Upshift improvements. • Downshift improvements. • Better gear engagement. • Uphill / Downhill improvements. • Improved coasting behavior.