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Service bulletin 0812023

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 id10239927
Published by NHTSA2023-07-31
Manufacturer's number0812023
Manufacturer's date2023-05-06
NHTSA componentELECTRICAL SYSTEM; POWER TRAIN; ENGINE AND ENGINE COOLING

NHTSA's summary

Flash: Drivetrain Control Module (DTCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) or warning lamp illumination. Upon further investigation the technician may find that the multiple Diagnostic Trouble Codes (DTCs) have been set: ? C1403-29 - Transfer Case Range Position Sensor-Signal Invalid. ? C14AA-62 - Transfer Case Motor Position Sensor Supply-Signal Compare Failure. This bulletin involves reprogramming the DTCM with the latest software available.

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, Transmission and driveline

Trouble codes named

C1403, C14AA

Vehicles listed
JEEP CHEROKEE2023
JEEP COMMANDER2023
JEEP COMPASS2023
JEEP GLADIATOR2023
JEEP GRAND CHEROKEE2023
JEEP GRAND WAGONEER2023
JEEP RENEGADE2023
JEEP WAGONEER2023
JEEP WRANGLER2023

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

Recalls for the same vehicles and component
26V4130002026-06-30. POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL)
20262242026-05-07. Powertrain
26V2900002026-05-07. POWER TRAIN
20256172025-11-06. Engine
25V7660002025-11-06. ENGINE
25V7410002025-10-30. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
25V7100002025-10-17. ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT:POWER CONTROL UNIT/MODULE (HPCU):SOFTWARE
25V5760002025-09-04. ELECTRICAL SYSTEM:PROPULSION SYSTEM
24V7200002024-09-27. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
24V6520002024-09-05. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

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
S26080000382026-10-16. Service bulletin. High Voltage Battery Has Lower SOC After Overnight Sleep Cycle
08-359-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
08-354-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
18-081-262026-10-16. Service bulletin. Not applicable to vehicles built for US market. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● P0607 - Control Module Performance. Customers may also comment on one or more of the following: ● The vehicle will not start until the ignition is cycled for a second time. ● Engine malfunction (injection) warning lamp illuminated in the Instrument Panel Cluster (IPC). This bulletin involves reprogramming the PCM with the latest available software.
18-080-262026-10-16. Service bulletin. Not applicable to vehicles built for US market. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● P0607 - Control Module Performance. Customers may also comment on one or more of the following: ● The vehicle will not start until the ignition is cycled for a second time. ● Engine malfunction (injection) warning lamp illuminated in the Instrument Panel Cluster (IPC). This bulletin involves reprogramming the PCM with the latest available software.
08-371-262026-10-16. Service bulletin. Flash: Electronic Shift Module (ESM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● U114C-00 - Lost Communication With PRNDL Display. ● P1C86-00 - PRNDL Display. Customers may also comment on one or more of the following: ● "Service Shifter" message showing on Instrument Panel Cluster (IPC). ● PRNDL lights are not illuminating. This bulletin involves reprogramming the ESM with the latest available software.
S26080000382026-10-16. Service bulletin. High Voltage Battery Has Lower SOC After Overnight Sleep Cycle
08-359-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
08-354-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
18-081-262026-10-16. Service bulletin. Not applicable to vehicles built for US market. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● P0607 - Control Module Performance. Customers may also comment on one or more of the following: ● The vehicle will not start until the ignition is cycled for a second time. ● Engine malfunction (injection) warning lamp illuminated in the Instrument Panel Cluster (IPC). This bulletin involves reprogramming the PCM with the latest available software.