# Service bulletin 0801124

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: 10251832
- Published by NHTSA: 2024\-03\-18
- Manufacturer's number: 0801124
- Manufacturer's date: 2024\-01\-09
- NHTSA component: EXTERIOR LIGHTING

## NHTSA's summary

Flash: Battery Pack Control Module \(BPCM\) Diagnostic and System Updates 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: ? P0AA4\-00 \- Hybrid Battery Negative Contactor Circuit Stuck Closed. ? P0AA1\-00 \- Hybrid/EV Battery Positive Contactor ?A? Stuck Closed. Customers may also experience the following: ? The vehicle will not start. This bulletin involves updating the BPCM with the latest available software.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10251832-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10251832-9999.pdf)

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

## Components

Lighting

## Trouble codes named

P0AA1, P0AA4

## Vehicles listed

- 2023 JEEP GRAND CHEROKEE

## Recalls for the same vehicles and component

- [2024113](/recalls/tc/2024113.md), 2024-02-22: Lights And Instruments
- [24V130000](/recalls/nhtsa/24V130000.md), 2024-02-22: EXTERIOR LIGHTING:HEADLIGHTS; ELECTRICAL SYSTEM:BODY CONTROL MODULE:SOFTWARE

## Other bulletins for the same vehicles and component

- [S2308000120 REV.B](/bulletins/11002024.md), 2024-06-24, Service bulletin: ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Rain Sensing Auto Wipers and Auto on Head Lamps Inoperative
- [2300424](/bulletins/10251854.md), 2024-03-18, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. Headlamp Condensation Clearing Procedure Some customers may report that on occasion, vehicle exterior head lamp assemblies are fogged with a light layer of condensation on the inside of the lenses.
- [2100324](/bulletins/10251837.md), 2024-03-18, Service bulletin: POWER TRAIN; EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Flash: Transmission Control Module \(TCM\) Updates 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 in the Hybrid Control Processor \(HCP\) module: ? P16F0\-00 \- SPI Comm Hardware Fault. Customers may also comment on one or more of the following: ? Shifts rough occasionally when coming down to a stop. ? Shifts rough occasionally when accelerating. ? Shifts rough when transitioning from EV to Hybrid operation on low SoC. ? Shifts rough when engines starts. ? On part throttle accelerations with little to no battery available the transition from battery power to engine on is harsh and abrupt. ? The engine oil life on dashboard drops down too fast when the engine oil dilution reaches high level without the ability to recover. This bulletin involves reprogramming the TCM, Powertrain Control Module \(PCM\) and the Auxiliary Hybrid Control Processor \(AHCP\) also known as Power Inverter Module \(PIM\), with the latest available software.
- [1800124](/bulletins/10251836.md), 2024-03-18, Service bulletin: EXTERIOR LIGHTING; ELECTRICAL SYSTEM; POWER TRAIN. Flash: Powertrain Control Module \(PCM\) Updates 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 in the Hybrid Control Processor \(HCP\) module: ? P16F0\-00 \- SPI Comm Hardware Fault. Customers may also comment on one or more of the following: ? Shifts rough occasionally when coming down to a stop. ? Shifts rough occasionally when accelerating. ? Shifts rough when transitioning from EV to Hybrid operation on low SoC. ? Shifts rough when engines starts. ? On part throttle accelerations with little to no battery available the transition from battery power to engine on is harsh and abrupt. ? The engine oil life on dashboard drops down too fast when the engine oil dilution reaches high level without the ability to recover. This bulletin involves reprogramming the PCM, Transmission Control Module \(TCM\) and the Auxiliary Hybrid Control Processor \(AHCP\) also known as Power Inverter Module \(PIM\), with the latest available software.
- [0801324](/bulletins/10251834.md), 2024-03-18, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN; EXTERIOR LIGHTING. Flash: Hybrid Control Processor \(HCP\) and Auxiliary Hybrid Control Processor \(AHCP\) Updates 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 in the Hybrid Control Processor \(HCP\) module: ? P16F0\-00 \- SPI Comm Hardware Fault. Customers may also comment on one or more of the following: ? Shifts rough occasionally when coming down to a stop. ? Shifts rough occasionally when accelerating. ? Shifts rough when transitioning from EV to Hybrid operation on low SoC. ? Shifts rough when engines starts. ? On part throttle accelerations with little to no battery available the transition from battery power to engine on is harsh and abrupt. ? The engine oil life on dashboard drops down too fast when the engine oil dilution reaches high level without the ability to recover. This bulletin involves reprogramming the Powertrain Control Module \(PCM\), Transmission Control Module \(TCM\) and the AHCP also known as Power Inverter Module \(PIM\), with the latest available software.
- [2302923](/bulletins/10248045.md), 2024-01-02, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. Headlamp Condensation Clearing Procedure Some customers may report that on occasion, vehicle exterior head lamp assemblies are fogged with a light layer of condensation on the inside of the lenses \(Fig. 1\) . This bulletin is to communicate the procedure for head lamp condensation clearing.
- [0803523](/bulletins/10248010.md), 2024-01-02, Service bulletin: EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Flash: Memory Seat Module \(MSM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code \(DTC\). ? B1D9B\-54 \- Seat Horizontal Front Stop Not Learned\-Missing Calibration. Customers may experience the following: ? Memory seat does not save on profiles 1 or 2. ? Easy entry/exit functionality is inoperative. This bulletin involves reprogramming the MSM with the latest available software.
- [1801523](/bulletins/10247997.md), 2024-01-02, Service bulletin: SERVICE BRAKES; EXTERIOR LIGHTING; BACK OVER PREVENTION; ELECTRICAL SYSTEM. Flash: Powertrain Control Module \(PCM\) Updates 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: ? C053D \- Brake Pressure Sensor 1 Performance. This bulletin involves reprogramming the PCM with the latest available software.
- [S2308000019](/bulletins/10247957.md), 2024-01-02, Service bulletin: EXTERIOR LIGHTING. Auto High Beams Characteristics, Auto High Beams Not Turning on When Enabled
- [S2308000120](/bulletins/10244419.md), 2023-10-30, Service bulletin: VISIBILITY/WIPER; EXTERIOR LIGHTING:HEADLIGHTS. Rain Sensing Auto Wipers and Auto on Head Lamps Inoperative

JSON: [/v1/bulletins/10251832](/v1/bulletins/10251832)

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