# Service bulletin 08\-144\-24

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.

- Type: Service bulletin
- NHTSA id: 11002313
- Published by NHTSA: 2024\-06\-25
- Manufacturer's number: 08\-144\-24
- Manufacturer's date: 2024\-06\-22
- NHTSA component: POWER TRAIN; ELECTRICAL SYSTEM
- Manufacturer's system: Motor Generator Unit

## NHTSA's summary

"Motor Generator Unit \(MGU\) Replacement Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code \(DTC\) has been set: ● P1B0F\-00 \- Drive Motor A Position Sensor Offset Incorrect. Customers may experience one or more of the following: ● Vehicle goes into limp home mode. ● Vehicle does not start. This bulletin involves inspecting the MGU serial number and possibly replacing the MGU as needed."

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11002313-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11002313-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Transmission and driveline

## Trouble codes named

P1B0F

## Vehicles listed

- 2023 to 2024 JEEP GRAND CHEROKEE
- 2023 to 2024 JEEP WRANGLER

## Recalls for the same vehicles and component

- [26V413000](/recalls/nhtsa/26V413000.md), 2026-06-30: POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION \(PRNDL\)
- [25V741000](/recalls/nhtsa/25V741000.md), 2025-10-30: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [25V710000](/recalls/nhtsa/25V710000.md), 2025-10-17: ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT:POWER CONTROL UNIT/MODULE \(HPCU\):SOFTWARE
- [25V576000](/recalls/nhtsa/25V576000.md), 2025-09-04: ELECTRICAL SYSTEM:PROPULSION SYSTEM
- [24V872000](/recalls/nhtsa/24V872000.md), 2024-11-19: ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER
- [24V871000](/recalls/nhtsa/24V871000.md), 2024-11-19: EXTERIOR LIGHTING; ELECTRICAL SYSTEM:WIRING
- [24V720000](/recalls/nhtsa/24V720000.md), 2024-09-27: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [24V652000](/recalls/nhtsa/24V652000.md), 2024-09-05: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [24V130000](/recalls/nhtsa/24V130000.md), 2024-02-22: EXTERIOR LIGHTING:HEADLIGHTS; ELECTRICAL SYSTEM:BODY CONTROL MODULE:SOFTWARE
- [23V787000](/recalls/nhtsa/23V787000.md), 2023-11-22: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY

## Other bulletins for the same vehicles and component

- [S2608000038](/bulletins/11038557.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. High Voltage Battery Has Lower SOC After Overnight Sleep Cycle
- [08\-355\-26](/bulletins/11038545.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. 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\-26](/bulletins/11038544.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. 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\-371\-26](/bulletins/11038529.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. 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.
- [S2608000038](/bulletins/11038520.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. High Voltage Battery Has Lower SOC After Overnight Sleep Cycle
- [08\-355\-26](/bulletins/11038508.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. 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\-26](/bulletins/11038507.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. 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\-371\-26](/bulletins/11038492.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. 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.
- [S2621000004](/bulletins/11038329.md), 2026-10-07, Service bulletin: POWER TRAIN. The Customer May Complain About a Popping Noise, Grinding Noise, or an Intermittent No Reverse or Forward Transmission Engagement. The Tech May Find Damaged and/or Worn Transmission Output Shaft Splines \(850RE Transmission Only\)
- [114741](/bulletins/11037596.md), 2026-09-30, Service bulletin: POWER TRAIN. TRANSMISSION KIT \- WITH TORQUE CONVERTER

JSON: [/v1/bulletins/11002313](/v1/bulletins/11002313)

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