WenmarOpen by Wenmar Pro

Service bulletins for the 2018 Jeep Grand Cherokee

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.

447 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
18-067-202020-09-28. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. 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 Diagnostic Trouble Codes (DTCs) have been set:P0133-00 - O2 Sensor 1/1 Slow Response. P20EE-00 - SCR NOX Catalyst Efficiency Below Threshold Bank 1. P050E-00 - Cold Start Engine Exhaust Temperature Too Low. P0299 - Turbocharger Underboost Condition. The following software enhancement is available:Calibration to correct the On-Board Diagnostic (OBD) system?s inability to detect and set DTCP0420 - Catalyst Efficiency (Bank 1)when the Diesel Oxidation Catalyst (DOC) is missing.
S20080001302020-09-28. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Radio UConnect GPS Based Trip Computer Missing
S20080001132020-09-28. Service bulletin. ENGINE; ELECTRICAL SYSTEM. No Start Intermittently, Vehicle Requires Multiple Keyless Push To Start Attempts To Start Vehicle
S20080001002020-08-24. Service bulletin. EQUIPMENT:RECREATIONAL VEHICLE/TRAILER:120/240 VAC ELECTRICAL SYSTEM:SERVICE CONNECTION; ELECTRICAL SYSTEM. Trailer Wiring Connector Adapter 4-Pin And 7-Pin Circuit Identification
S20080000102020-08-24. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM. Apple Carplay Inoperative Or Not Working, Phone Not Pairing, Carplay Lockup, Freeze or Audio Concerns
S20080000932020-07-27. Service bulletin. ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:WARNING; ELECTRICAL SYSTEM:ADAS:BLINDSPOT:WARNING:LAMP. Blind Spot Or Park Assist Warnings, False Activation
S20080000732020-06-22. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:SOFTWARE. VP4 Panasonic Radio USB Software Update Error Codes And Guidelines For Recovery
S19080000482020-06-22. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Chime Stuck On In The Audio System
S20080000552020-06-22. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT. Battery Vent Tube Does Not Align With Some New Battery Installations
08-049-202020-05-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Charging System, Battery Diagnostic Tools and Warranty This information only bulletin discusses using the correct test equipment for testing batteries and charging systems, and also warranty reimbursement when battery replacements are necessary.
S18080001522020-05-26. Service bulletin. ELECTRICAL SYSTEM. CEL (Check Engine Lamp) Illuminates, Recent PCM Replace Or Flash Update Performed, DTC P057B Brake Pedal Position Sensor Circuit Performance
S20080000552020-05-26. Service bulletin. ELECTRICAL SYSTEM. Battery Vent Tube Does Not Align With Some New Battery Installations
S20080000312020-05-26. Service bulletin. ELECTRICAL SYSTEM. Low Charging Voltage Displayed On Cluster
S20250000012020-05-26. Service bulletin. ELECTRICAL SYSTEM. Malfunction Indicator Lamp Illumination (MIL). Diagnostic Trouble Code (DTC) P203E ? Reductant Level Sensor 1 Circuit Intermittent-Erratic Set.
S20050000032020-05-18. Service bulletin. ELECTRICAL SYSTEM. ABS And ESP Warning In EVIC C0037-1D C003A-1D
S18080001752020-05-18. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. LED Front Fog Lamps Flicker Or Intermittently Light, Are Dim Or Inoperative. A U11E9, or B16FB-15 may be set
S20250000012020-05-18. Service bulletin. ELECTRICAL SYSTEM. Malfunction Indicator Lamp Illumination (MIL). Diagnostic Trouble Code (DTC) P203E ? Reductant Level Sensor 1 Circuit Intermittent-Erratic Set.
S18080001752020-04-27. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY; EXTERIOR LIGHTING. LED Front Fog Lamps Flicker Or Intermittently Light, Are Dim Or Inoperative. A U11E9, or B16FB-15 may be set
08-016-202020-04-06. Service bulletin. ELECTRICAL SYSTEM; SEATS. Body Control Module (BCM) Reconfigure for Enabling the Auto-On Comfort Settings This bulletin involves reconfiguring the BCM and possibly a radio reset, to enable the auto-on comfort settings. Customers may comment on one or more of the following:If below 4 °C (40 °F), the heated seats or heated steering wheel turn on by themselves. If above 26 °C (80 °F), the vented seats turn on by themselves. Cannot turn off the auto-on comfort feature. With the symptom/condition listed above, there?s no setting in the radio to turn the auto-on comfort feature off.
S20080000132020-04-06. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Key Programming, Security Pin Request, Pin Invalid
21-048-192020-01-21. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM 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 Diagnostic Trouble Codes (DTCs) have been set: P0979-00 - Shift Solenoid 3 Control Circuit Low. P0219-00 - Engine Overspeed Condition. In addition, the customer may notice the following condition:A harsh shift on coast down 3-2 or 2-1.
18-094-192019-12-16. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. 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: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. P0300 - Multiple Cylinder Misfire. P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. In addition, customers may experience the following condition:Engine will auto stop and will not auto restart or the engine will auto start and this will result in a misfire, requiring customer to shift into park and manually restart vehicle. Other enhancements included in this update:Improvement for Engine Stop/Start (ESS) System.
18-093-192019-12-16. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. 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 the following Diagnostic Trouble Codes (DTCs) have been set: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. P06EF - Engine Restart Performance.
08-016-19 REV. F2019-12-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. UAS, UAQ, UCS and UCQ Radio Enhancements This bulletin involves inspecting and if required, updating the radio software level to:22.6 - DS, D2, DP, DD, DF and DJ vehicle with UAS, UCQ and UAQ radio. 22.5 - LA, LD and LX vehicle with UAS and UAQ. 21.9 - All other vehicles and radios. Customers may experience one or more of the following:Audio Distortion (DS, D2, DP, DD, DF and DJ vehicle with UAS, UCQ and UAQ radio). Menu bar at the bottom of the radio display is frozen (LA, LD and LX with UAQ and UAS radios). Can not change the time on the clock (LA, LD and LX with UAS radios). Anti-theft code request message. Backup camera screen is blank. Lines appear across screen. Radio control screen is blank or locked. Radio resets intermittently. Unable to adjust volume. Radio will not switch modes between AM, FM, SAT or Media. In addition, the following enhancements are included in this update:Carplay® connectivity improvements. Improvement to Bluetooth phone pairing. Improved sound quality when using a Bluetooth phone.
08-016-19 REV. D2019-12-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. UAS, UAQ, UCS and UCQ Radio Enhancements This bulletin involves inspecting and if required, updating the radio software level to:22.6 - DS, D2, DP, DD, DF and DJ vehicle with UAS, UCQ and UAQ radio. 22.5 - LA, LD and LX vehicle with UAS and UAQ. 21.9 - All other vehicles and radios. Customers may experience one or more of the following:Audio Distortion (DS, D2, DP, DD, DF and DJ vehicle with UAS, UCQ and UAQ radio). Menu bar at the bottom of the radio display is frozen (LA, LD and LX with UAQ and UAS radios). Can not change the time on the clock (LA, LD and LX with UAS radios). Anti-theft code request message. Backup camera screen is blank. Lines appear across screen. Radio control screen is blank or locked. Radio resets intermittently. Unable to adjust volume. Radio will not switch modes between AM, FM, SAT or Media. In addition, the following enhancements are included in this update:Carplay® connectivity improvements. Improvement to Bluetooth® phone pairing. Improved sound quality when using a Bluetooth phone.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.