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Service bulletins for the 2019 Subaru Ascent

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.

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

By type

By component

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
15-229-18R2019-05-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM. This bulletin provides troubleshooting steps to follow when diagnosing clock-related customer concerns. Please start by completing the Harman Investigation Guide Questionnaire as it gathers important details which will help with diagnosis and will be required should the condition not be resolved by this troubleshooting.
15-236-18R2019-03-11. Service bulletin. ELECTRICAL SYSTEM. The following information addresses reprogramming file availability and a software update installation procedure to provide optimization to the new Harman Gen 3.1 Audio and Navigation head units utilized in the models as listed above. The procedure will involve either downloading the software update files from Subarunet (or using those sent directly from Nuspire) and transferring them onto a flash drive for head unit installation.
11-183-18R2019-02-25. Service bulletin. ELECTRICAL SYSTEM. This bulletin announces reprogramming file availability to optimize the ECM. These new files involve the ECM?s diagnosis of DTC P0045:
07-143-18R2019-02-19. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin announces a change made to the PRG control module. This change is in response to a limited number of customer concerns regarding the PRG reversing direction before reaching the fully open position. The control module senses that an object is caught in the PRG and engages the system?s reverse (safety) function. The new PRG control modules contain improved operating logic to correct this condition.
15-219-18R2018-12-10. Service bulletin. ELECTRICAL SYSTEM. When attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and/or 204 may occur preventing the process from completing successfully. These codes both relate to the multi-stage CommCheck process which introduces the Data Communications Module (DCM) to the AT&T cellular network the Telematics system operates on. The Telematics Service Provider (TSP) cannot communicate with the vehicle (DCM) until the CommCheck completes successfully.
15-219-18R2018-12-10. Service bulletin. ELECTRICAL SYSTEM. When attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and / or 204 may occur preventing the process from completing successfully. These codes both relate to the multi-stage CommCheck process which introduces the Data Communications Module (DCM) to the AT&T cellular network the Telematics system operates on. The Telematics Service Provider (TSP) cannot communicate with the vehicle (DCM) until the CommCheck completes successfully.
15-220-18R2018-12-10. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides troubleshooting steps to use when diagnosing concerns of the Apple CarPlay and/or Android Auto feature not connecting or launching properly when a compatible device is connected to the head unit.
15-220-18R2018-11-05. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT:ELECTRICAL. This bulletin provides troubleshooting steps to use when diagnosing concerns of the Apple CarPlay and / or Android Auto feature not connecting or launching properly when a compatible device is connected to the head unit.
15-226-18R2018-11-05. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL; EQUIPMENT. This bulletin provides troubleshooting steps to follow when diagnosing customer concerns regarding USB functionality. Please start by completing the Harman Investigation Guide Questionnaire as it gathers important details which will help with diagnosis and will be required should the condition not be resolved by this troubleshooting. While completing the questionnaire, follow the question flow based on the customer concern. Answer each related question noting the results to each in detail while performing the diagnostics. Review the entire bulletin before beginning in order to understand the flow for the listed concern. If the concern you have is not listed, check the Service Manual ?Infotainment (Diagnostics) - Diagnostics with Phenomena? section as a starting point.
15-228-182018-10-01. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM; EQUIPMENT. This bulletin provides troubleshooting steps to follow when diagnosing a customer concern of the display screen being either frozen (unresponsive) or black (blank). Please start by completing the Harman Investigation Guide Questionnaire as it gathers important details which will help with diagnosis and will be required should the condition not be resolved by this troubleshooting. While completing the questionnaire, follow the question flow based on the customer concern. Answer each related question noting the results to each in detail while performing the diagnostics. Review the entire bulletin before beginning in order to understand the flow for the listed concern.
15-226-182018-10-01. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM. This bulletin provides troubleshooting steps to follow when diagnosing customer concerns regarding USB functionality. Please start by completing the Harman Investigation Guide Questionnaire as it gathers important details which will help with diagnosis and will be required should the condition not be resolved by this troubleshooting. While completing the questionnaire, follow the question flow based on the customer concern. Answer each related question noting the results to each in detail while performing the diagnostics. Review the entire bulletin before beginning in order to understand the flow for the listed concern
15-219-18R2018-08-20. Service bulletin. ELECTRICAL SYSTEM. When attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and / or 204 may occur preventing the process from completing successfully. These codes both relate to the multi-stage CommCheck process which introduces the Data Communications Module (DCM) to the AT&T cellular network the Telematics system operates on. The Telematics Service Provider (TSP) cannot communicate with the vehicle (DCM) until the CommCheck completes successfully.
15-219-18R2018-07-16. Service bulletin. ELECTRICAL SYSTEM. When attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and / or 204 may occur preventing the process from completing successfully. These codes both relate to the multi-stage CommCheck process which introduces the Data Communications Module (DCM) to the AT&T cellular network the Telematics system operates on. The Telematics Service Provider (TSP) cannot communicate with the vehicle (DCM) until the CommCheck completes successfully.

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