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Service bulletin 18-024-19 REV. B

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)
TypeService bulletin
NHTSA id10168464
Published by NHTSA2019-12-02
Manufacturer's number18-024-19 REV. B
Manufacturer's date2019-10-16
NHTSA componentELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

NHTSA's summary

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 that the one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P06EF - Engine Restart Performance. P0456 - EVAP System Small Leak. Customers may also comment on one or more of the following: Extended engine crank times or possibly a no start condition(South Korea with Sales Code EDD only). The engine fails to restart while in Engine Stop/Start (ESS) mode. This is usually accompanied withDTC P06EF.

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

Trouble codes named

P0456, P06EF

Vehicles listed
JEEP CHEROKEE2019

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

Recalls for the same vehicles and component
18V7390002018-10-19. POWER TRAIN:AUTOMATIC TRANSMISSION
18V4920002018-07-26. POWER TRAIN:AUTOMATIC TRANSMISSION

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
18065232023-07-31. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software.
18052202022-09-26. Service bulletin. Flash: Powertrain Control Module (PCM) Updates 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 that the following DTCs have been set:P04FC - Crankcase Ventilation System Performance. P152F - Engine Hood Switch 2 / Engine Hood Switch 1 Correlation(EMEA only equipped with Gas Particulate Filter (GPF))(DTC will set when driving above 72 kph (45 mph). 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. P050B - Cold Start Ignition Timing Performance. P258B - Electric Vacuum Pump Performance. C1252-92 - Vacuum Pump Control Circuit - Performance Or Incorrect Operation. P2B95 - Cold Start Injection Pulse Performance. P062A - Fuel Pump Control Performance. P058C - Battery Monitor Module Temperature Monitoring Performance. P0607 - ECU Internal Performance. Injector performance faults for cylinders 2 - 4 map to DTC for incorrect cylinders. In addition the following software enhancement are included:Software corrects an issue with the wrong cylinder identification if an injector circuit performance fault is set in the PCM:If any of the series of injector control circuit faults are set, please refer to the bullet-pointed list below to determine which injector to address.For reference, the correct injector circuit performance faults are listed below:P02EE - Cylinder 1 Injector Circuit Performance. P02EF - Cylinder 2 Injector Circuit Performance. P02F0 - Cylinder 3 Injector Circuit Performance. P02F1 - Cylinder 4 Injector Circuit Performance. Customers may also experience the following condition:Audible noise from the Low Temperature Radiator (LTR) coolant pump, at low speeds. Abnormal noise from the radiator cooling fan. LTR runs too long after the engine is turned off.
18-063-20 REV. B2020-12-28. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs): P20EE-00 - SCR NOx Catalyst Efficiency Below Threshold Bank 1 Catalyst 1. P24B2-00 - Particulate Matter Sensor Circuit Intermittent. Customers may also describe the following condition: Engine Start/Stop inoperative. Remote start inoperative (South Korea vehicles only). Incorrect vehicle speed reported by the cluster when the driver changes the speed units. Undesirable pedal response in 4-LO mode. Selective Catalytic Reduction (SCR) system fault codes logged at higher vehicle speeds. Alternator load protection at idle. Check Engine Lamp or low battery indicator
18-001-20 REV. B2020-12-28. Service bulletin. Flash: Powertrain Control Module (PCM) Updates - AN-K4MCA-18-20201001 Refer to China Joint Venture (JV) released document AN-K4MCA-18-20201001, for details on this service action.
S20180000122020-12-28. Service bulletin. Check engine lamp on. Fault code P0244- TURBOCHARGER/SUPERCHARGER WASTEGATE SOLENOID "A" RANGE/PERFORMANCE is set in the Powertrain Control Module (PCM a.k.a. ECM) after the turbocharger assembly has been replaced.
18-063-20 REV. B2020-12-21. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs):P20EE-00 - SCR NOx Catalyst Efficiency Below Threshold Bank 1 Catalyst 1. P24B2-00 - Particulate Matter Sensor Circuit Intermittent. Customers may also describe the following condition:Engine Start/Stop inoperative. Remote start inoperative(South Korea vehicles only). Incorrect vehicle speed reported by the cluster when the driver changes the speed units. Undesirable pedal response in 4-LO mode. Selective Catalytic Reduction (SCR) system fault codes logged at higher vehicle speeds. Alternator load protection at idle. Check Engine Lamp or low battery indicator
18-001-20 REV. B2020-12-21. Service bulletin. Flash: Powertrain Control Module (PCM) Updates - AN-K4MCA-18-20201001 Refer to China Joint Venture (JV) released document AN-K4MCA-18-20201001, for details on this service action.
S20180000122020-12-21. Service bulletin. Check engine lamp on. Fault code P0244- TURBOCHARGER/SUPERCHARGER WASTEGATE SOLENOID "A" RANGE/PERFORMANCE is set in the Powertrain Control Module (PCM a.k.a. ECM) after the turbocharger assembly has been replaced.
18-063-20 REV. A2020-11-30. Service bulletin. Flash: Powertrain Control Module (PCM) Updates The previous release for this PCM software has been removed. Software updates to correct issues will be re-released by the end of 4th quarter 2020.
18-084-20 REV. A2020-11-30. 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:P2610 - PCM Internal Engine Off Timer Performance. P06EF - Engine Restart Performance. 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. C1252 - Vacuum Pump Control Circuit - Performance Or Incorrect Operation. P06DA - Engine Oil Pressure Control Circuit. P06DD - Engine Oil Pressure Control Circuit Stuck Off. P06DE - Engine Oil Pressure Control Circuit Stuck On. B25C7 - Driver Door Ajar Switch 2 Circuit Low. B25C8 - Driver Door Ajar Switch 2 Circuit High. B25C9 - Driver Door Ajar Switch 2 Stuck Closed. B25CB - Driver Door Ajar Switch 1/Driver Door Ajar Switch 2 Correlation. C10D0 - Electronic Park Brake Module Deactivated. P0EA5 - DC/DC Converter 2 Performance. P0EA6 - DC/DC Converter 2 Over Temperature. P2299 - Brake Pedal Position/Accelerator Pedal Position Incompatible. U0128 - Lost Communication With Park Brake Control Module. U0151 - Lost Communication With Occupant Restraint Controller. U0416 - Implausible Data Received From Esp. U0418 - Implausible Data Received From Brake System Control Module 1. U0599 - Invalid Data Received From DC to DC Converter Control Module "A". U0299 - LOC With DC-DC Convertor 2. U1409 - Implausible LF WSS Received. U140A - Implausible RF WSS Received. U059A - Invalid Data Received From DC to DC Converter Control Module "B". C0542 - Brake Pressure Sensor 2 Circuit Low. C0543 - Brake Pressure Sensor 2 Circuit High. P258A - Electric Vacuum Pump Circuit (turn MIL off, switch to 1 trip fault). P0616 - Starter Control Circuit Low. P0617 - Starter Control Circuit High. P0607 - ECU Internal Performance. P3032 - Barometric Pressure Sensor Performance