# Service bulletin 0806921

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: 10221220
- Published by NHTSA: 2022\-09\-26
- Manufacturer's number: 0806921
- Manufacturer's date: 2021\-04\-29
- NHTSA component: HYBRID PROPULSION SYSTEM

## NHTSA's summary

Detailed Proper PHEV Engine Operation This bulletin is to communicate that when the combustion engine starts for the first time within a key\-cycle \(either when the vehicle is first operational at the key crank, or while driving\), the propulsion system will generally operate in ?series\-mode? for up to 60 seconds.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10221220-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10221220-9999.pdf)

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

## Components

Hybrid and electric drive

## Vehicles listed

- 2021 JEEP WRANGLER

## Recalls for the same vehicles and component

- [2025595](/recalls/tc/2025595.md), 2025-10-30: High Voltage
- [25V741000](/recalls/nhtsa/25V741000.md), 2025-10-30: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [2024566](/recalls/tc/2024566.md), 2024-09-27: High Voltage
- [24V720000](/recalls/nhtsa/24V720000.md), 2024-09-27: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [2023627](/recalls/tc/2023627.md), 2023-11-22: High Voltage
- [23V787000](/recalls/nhtsa/23V787000.md), 2023-11-22: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY

## Other bulletins for the same vehicles and component

- [S2308000117](/bulletins/10248571.md), 2024-01-08, Service bulletin: HYBRID PROPULSION SYSTEM. Check Engine Light On, P0CA6\-00 Hybrid/EV Battery Charging Current High
- [S2008000031](/bulletins/10243172.md), 2023-10-02, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:PORT. Low Charging Voltage Displayed On Cluster
- [S2208000139](/bulletins/10230305.md), 2023-01-17, Service bulletin: ELECTRICAL SYSTEM:PROPULSION SYSTEM:FUEL CELL. Check Engine Lamp \(CEL\) Multiple Diagnostic Trouble Codes \(DTC\)
- [0807321](/bulletins/10230092.md), 2023-01-17, Service bulletin: HYBRID PROPULSION SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. PHEV Ready Telltale This bulletin is to communicate that a customer may report the vehicle does not start with any warning indicators. A technician can not confirm any faults even if they can duplicate the reported concern.
- [9004376\-1](/bulletins/10229997.md), 2023-01-17, Service bulletin: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:THERMAL MANAGEMENT:PUMP. PUMP, Vacuum Prior to replacing the vacuum pumps, please contact or email FCA Redacted Content. If no response in 15 minutes, proceed with repair.
- [S2207000001](/bulletins/10228011.md), 2022-12-19, Service bulletin: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:THERMAL MANAGEMENT:FLUID/COOLANT; UNKNOWN OR OTHER. Coolant Color Looks Lighter Than Service Procedure Coolant
- [S2208000154](/bulletins/10225982.md), 2022-11-07, Service bulletin: ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT; FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; BACK OVER PREVENTION. Service Hybrid Electric Vehicle System Message Displayed In The IPC. Vehicle Shakes During A Cold Start And Noise Is Heard Near The P2 Motor. DTC?s U0287\-00 And B273C\-00
- [Z27](/bulletins/10225382.md), 2022-10-31, Service bulletin: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY. Customer Satisfaction Notification Z27 PHEV Battery Replacement
- [9100011](/bulletins/10225305.md), 2022-10-31, Service bulletin: FUEL SYSTEM, GASOLINE; EQUIPMENT; SERVICE BRAKES, HYDRAULIC; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT. Battery Kit, Hybrid NOTE 1 of 2: Beginning April 1, 2022, a $5,000 penalty will be assessed to dealers who return any visually damaged battery to the supplier. Improper handling of damaged lithium ion batteries can causer property damage, serious injury or even death. Exemptions will not be made for any dealer who fails to follow the appropriate handling process. To read the DCMail communication, go to DealerCONNECT \> DCMail \(ID: 81758\). For details on recyclers, please visit the Mopar Dealer Site Lithium Ion Battery Handling page: https://www.dealers\-mopar.com/moparone/retail/programs/battery\-program/lithium\-ion.jsp NOTE 2 of 2: When replacing the HV battery, or any cooling component within any of the cooling systems, please ensure that the service procedure is followed by using a coolant vacuum fill tool to ensure all trapped air is removed from the coolant system. The battery cooling system is complex with small coolant passages used to cool electronics. It is fed by a small electronic pump that does not develop the pressure head to "burp" the cooling system in the same manner that an engine water pump often will. All electric pumps are designed to sense air in the cooling system. Proper service procedures and proper equipment must be used. Failure to do so may result in vehicle damage or customer return for MIL lights due to air in the cooling system.
- [S2108000121](/bulletins/10223283.md), 2022-10-17, Service bulletin: ELECTRICAL SYSTEM:PROPULSION SYSTEM; ELECTRICAL SYSTEM. Check Engine Light On And Service Hybrid System Displayed. P0A0A\-00 High Voltage System Interlock Circuit ?A? Is Active

JSON: [/v1/bulletins/10221220](/v1/bulletins/10221220)

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