Service bulletin 21-025-20

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	10174242
Published by NHTSA	2020-04-27
Manufacturer's number	21-025-20
Manufacturer's date	2020-03-24
NHTSA component	EQUIPMENT ADAPTIVE/MOBILITY; POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL); POWER TRAIN; ELECTRICAL SYSTEM

NHTSA's summary

Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find the following Diagnostic Trouble Codes (DTCs) have been set:P0780 - Gear Shift Malfunction. P1DD2-00 - Torque Request Signal From TCM Denied. Customers or technicians may experience the following:Transmission will be placed into Limp-in mode. While driving at 65 kph (40 mph) a bump will be felt and the RPM will jump to 4000 RPM.

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, Equipment and accessories, Transmission and driveline, Automatic transmission

Trouble codes named

P0780, P1DD2

Vehicles listed
JEEP RENEGADE	2019

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
1800623	2023-07-31. Service bulletin. Flash: Powertrain Control Module (PCM) Updates Customers may experience the following: ? Engine Stop/Start does not work as expected and it is often automatically deactivated. Customers may also experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs): ? P2110 - Electronic Throttle Control System Bank 1 - Forced Limited RPM. ? P2173 - High Airflow/Vacuum Leak Detected (Slow Accumulation). ? U0100 - Lost Communication With ECM/PCM. ? P0456 - EVAP System Small Leak. NOTE: If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. ? P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following: ? The vehicle will not crank if the ECM gets hotter than 50 °C (122 °F). ? Intermittent no-crank when first starting the vehicle. The following DTC has been changed from a one trip fault to a two trip fault: ? P0607 - ECU Internal Performance. This bulletin involves reprogramming the PCM with the latest available software.
1804721	2023-01-17. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience the following: After a short trip and shutting the engine off for 5 - 10 minutes, vehicle exhibits a long crank/start condition.
1809420	2022-10-17. Service bulletin. Flash: Powertrain Diagnostic and System Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software.
1804721	2022-10-17. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience the following: After a short trip and shutting the engine off for 5 - 10 minutes, vehicle exhibits a long crank/start condition.
1803821	2022-09-26. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs have been set: P2110 - Electronic Throttle Control System Bank 1 - Forced Limited RPM. P2173 - High Airflow/Vacuum Leak Detected (Slow Accumulation). U0100 - Lost Communication With ECM/PCM. P0456 - EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following: The vehicle will not crank if the ECM gets hotter than 50 °C (122°F). Intermittent no-crank when first starting the vehicle. The following Diagnostic Trouble Codes (DTCs) have been changed from a one trip fault to a two trip fault: P0607 - ECU Internal Performance.
18-104-20	2020-12-28. Service bulletin. Flash: Powertrain Control Module (PCM) Updates - AN-BQ-18-20200920 Refer to China Joint Venture (JV) released document AN-BQ-18-20200920, for details on this service action.
18-104-20	2020-12-21. Service bulletin. Flash: Powertrain Control Module (PCM) Updates - AN-BQ-18-20200920 Refer to China Joint Venture (JV) released document AN-BQ-18-20200920, for details on this service action.
18-094-20	2020-11-30. Service bulletin. Flash: Powertrain Diagnostic and System Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software.
11-004-20	2020-09-28. Service bulletin. Diesel Particulate Matter Sensor - Associated to DTCs - P24D1 and P24AE This bulletin involves replacing the diesel particulate sensor when one or more of the following Diagnostic Trouble Codes (DTCs) are active in the Powertrain Control Module (PCM). Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs. P24D1-00 - Particulate Matter Sensor Regeneration Incomplete. P24AE-00 - Particulate Matter Sensor Circuit.
18-028-20 REV. A	2020-06-22. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs have been set:U0100 - Lost Communication With ECM/PCM. P0456 - EVAP System Small Leak. If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following: The vehicle will not crank if the ECM gets hotter than 50 °C (122 °F). Intermittent no-crank when first starting the vehicle.