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Service bulletins for the 2022 Jeep Wrangler

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.

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

About P0AA4 on the 2022 Jeep Wrangler: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: P0AA4 are shown. Show all

Bulletins, newest first
08-038-262026-02-12. Service bulletin. ELECTRICAL SYSTEM. Flash: Battery Pack Control Module (BPCM) 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): ● P0B28-00 - Hybrid/EV Battery “B” Voltage Unstable. ● P0BBE-00 - Hybrid/EV Battery Pack Voltage Variation. ● P0AA1-00 - Hybrid/EV Battery Positive Contactor “A” Stuck Closed. ● P0C78-00 - Hybrid/EV Battery System Precharge Time Too Long. ● P0CA6-00 - Hybrid/EV Battery Charging Current High. ● P0B24-00 - Hybrid/EV Battery "A" Voltage Unstable. ● P1C5E-00 - Hybrid/EV Battery State Of Health Failed. ● P0DAB-00 - Hybrid/EV Cell Balancing Performance. ● P0607-00 - ECU Internal Performance.** **Customers may also comment on the following: ● Vehicle does not start. NOTE: The no start condition is accompanied with the following DTCs: P0DAB-00, P0607-00, P0AA1-00, P0AA4-00, P0C78-00, P0CA6-00, P0B24-00 and/or P1C5E-00. P0B28-00 will result in a MIL for 49 days. After 49 days of the MIL, the vehicle will no longer be allowed to start.** This bulletin involves reprogramming the BPCM with the latest available software. NOTE: Additional module flashes are required for this update to be effective, the following modules
08-079-24 REV. A2024-12-18. Service bulletin. ELECTRICAL SYSTEM. "Flash: Battery Pack Control Module (BPCM) 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: ● **P0DAB - Hybrid/EV Cell Balancing Performance.** ● P0AA1 - Hybrid/EV Battery Positive Contactor “A” Stuck Closed. ● P0AA4 - Hybrid Battery Negative Contactor Circuit Stuck Closed. ● P0CA6-00 - Hybrid/EV Battery Charging Current High. ● P0B24-00 - Hybrid/EV Battery ""A"" Voltage Unstable. ● P1C5E-00 - Hybrid/EV Battery State Of Health Failed. ● P0BBE-00 - Hybrid/EV Battery pack Voltage Variation. ● P0607-00 - ECU Internal Performance. ● P0C78 - Hybrid/EV Battery System Precharge Time Too Long This bulletin involves updating the BPCM with the latest available software. NOTE: Additional module flashes are required for this update to be effective, the following modules are all to be updated along with this BPCM update: ● Powertrain Control Module (PCM). ● Integrated Dual Charging Module (IDCM). ● Transmission Control Module (TCM). ● Hybrid Control Processor (HCP), Auxiliary Hybrid Control Processor (AHCP) also known as the Power Inverter Module (PIM)"
08050232024-01-02. Service bulletin. POWER TRAIN; EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Flash: Battery Pack Control Module (BPCM) Diagnostic and System Updates Customers may experience a false Malfunction Indicator Lamp (MIL) illumination related to PHEV battery: ? P1A21-00 - HV Battery Contactor Control Sequence Incorrect. ? P0B3E-00 - Hybrid/EV Battery Voltage Sense 1 Circuit High. ? P0607-00 - ECU Internal Performance. ? P1E1B-00 - Hybrid/EV Battery Side Voltage System Isolation. ? P0AA4-00 - Hybrid Battery Negative Contactor Circuit Stuck Closed. This bulletin involves updating the BPCM with the latest available software. NOTE: Additional module flashes are required for this update to be effective, the following modules are all to be updated along with this BPCM update: ? Powertrain Control Module (PCM). ? Integrated Dual Charging Module (IDCM). ? Transmission Control Module (TCM). ? Battery Pack Control Module (BPCM). ? Hybrid Control Processor (HCP), Auxiliary Hybrid Control Processor (AHCP) also known as the Power Inverter Module (PIM).
08050232023-04-17. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN; EXTERIOR LIGHTING. Flash: Battery Pack Control Module (BPCM) Diagnostic and System Updates Customers may experience a false Malfunction Indicator Lamp (MIL) illumination related to PHEV battery: ? P1A21-00 - HV Battery Contactor Control Sequence Incorrect. ? P0B3E-00 - Hybrid/EV Battery Voltage Sense 1 Circuit High. ? P0607-00 - ECU Internal Performance. ? P1E1B-00 - Hybrid/EV Battery Side Voltage System Isolation. ? P0AA4-00 - Hybrid Battery Negative Contactor Circuit Stuck Closed. This bulletin involves updating the BPCM with the latest available software. NOTE: Additional module flashes are required for this update to be effective, the following modules are all to be updated along with this BPCM update: ? Powertrain Control Module (PCM). ? Integrated Dual Charging Module (IDCM). ? Transmission Control Module (TCM). ? Battery Pack Control Module (BPCM). ? Hybrid Control Processor (HCP), Auxiliary Hybrid Control Processor (AHCP) also known as the Power Inverter Module (PIM).
08146222023-01-09. Service bulletin. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:MANAGEMENT SYSTEM/ENERGY CONTROL MODULE (BMS/BECM); ELECTRICAL SYSTEM. Flash: Battery Pack Control Module (BPCM) Diagnostic and System Updates This bulletin involves updating the BPCM with the latest available software. Customers may experience a false Malfunction Indicator Lamp (MIL) illumination related to PHEV battery: P1A21-00 - HV Battery Contactor Control Sequence Incorrect. P0B3E-00 - Hybrid/EV Battery Voltage Sense 1 Circuit High. P0607-00 - ECU Internal Performance. P1E1B-00 - Hybrid/EV Battery Side Voltage System Isolation. P0AA4-00 - Hybrid Battery Negative Contactor Circuit Stuck Closed.
08146222022-10-31. Service bulletin. ELECTRICAL SYSTEM. Flash: Battery Pack Control Module (BPCM) Diagnostic and System Updates This bulletin involves updating the BPCM with the latest available software. Customers may experience a false Malfunction Indicator Lamp (MIL) illumination related to PHEV battery: P1A21-00 - HV Battery Contactor Control Sequence Incorrect. P0B3E-00 - Hybrid/EV Battery Voltage Sense 1 Circuit High. P0607-00 - ECU Internal Performance. P1E1B-00 - Hybrid/EV Battery Side Voltage System Isolation. P0AA4-00 - Hybrid Battery Negative Contactor Circuit Stuck Closed.
08146222022-10-31. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING; ELECTRICAL SYSTEM:SOFTWARE. Flash: Battery Pack Control Module (BPCM) Diagnostic and System Updates This bulletin involves updating the BPCM with the latest available software. Customers may experience a false Malfunction Indicator Lamp (MIL) illumination related to PHEV battery: P1A21-00 - HV Battery Contactor Control Sequence Incorrect. P0B3E-00 - Hybrid/EV Battery Voltage Sense 1 Circuit High. P0607-00 - ECU Internal Performance. P1E1B-00 - Hybrid/EV Battery Side Voltage System Isolation. P0AA4-00 - Hybrid Battery Negative Contactor Circuit Stuck Closed.

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