{"vehicle":{"id":"2022_jeep_wrangler","year":2022,"make":"Jeep","model":"Wrangler"},"code":"P0AA4","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":7,"bulletins":[{"nhtsa_id":11028756,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-02-12","date":"2026-02-04","document_id":"08-038-26","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"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","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028756-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028756-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11028756"},{"nhtsa_id":11011924,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-12-18","date":"2024-12-14","document_id":"08-079-24 REV. A","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"\"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)\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11011924-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11011924-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11011924"},{"nhtsa_id":10248011,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-01-02","date":"2023-02-10","document_id":"0805023","mfr_campaign":null,"component":"POWER TRAIN; EXTERIOR LIGHTING; ELECTRICAL SYSTEM","summary":"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).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10248011-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10248011-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10248011"},{"nhtsa_id":10234484,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-04-17","date":"2023-02-10","document_id":"0805023","mfr_campaign":null,"component":"ELECTRICAL SYSTEM; POWER TRAIN; EXTERIOR LIGHTING","summary":"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).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10234484-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10234484-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10234484"},{"nhtsa_id":10229535,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-01-09","date":"2022-08-03","document_id":"0814622","mfr_campaign":null,"component":"ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:MANAGEMENT SYSTEM/ENERGY CONTROL MODULE (BMS/BECM); ELECTRICAL SYSTEM","summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229535-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229535-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10229535"},{"nhtsa_id":10225387,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-10-31","date":"2022-08-03","document_id":"0814622","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10225387-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10225387-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10225387"},{"nhtsa_id":10225250,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-10-31","date":"2022-08-03","document_id":"0814622","mfr_campaign":null,"component":"ELECTRICAL SYSTEM; EXTERIOR LIGHTING; ELECTRICAL SYSTEM:SOFTWARE","summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10225250-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10225250-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10225250"}],"url":"https://open.wenmarpro.com/makes/jeep/wrangler/2022/bulletins?code=P0AA4"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/jeep/wrangler/2022/codes/P0AA4","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}