2023 Subaru Ascent Technical Service Bulletins

293 technical service bulletins (TSBs) are on record for the 2023 Subaru Ascent. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11022297Aug 7, 2025Engine, Electrical system. This bulletin announces the availability of reprogramming files for the Engine Control Module (ECM) to address the following Diagnostic Trouble Code (DTC): P062F - Internal Control Module EEPROM Error.
• 11022295Aug 7, 2025Body and structure. This bulletin provides additional examples, diagnostics tips and installation tips as helpful aids to be used when working with sunroof seals and sunroof frame assemblies on Ascent models.
• 11021265Jul 29, 2025Electrical system, Seats. This bulletin announces the availability of new seat ventilation blower units.
• 11021262Jul 16, 2025Electrical system. This OTA is released to address Telematic functions that may stop working after a certain amount of time from the vehicle's production.
• 11021259Jul 14, 2025Electrical system, Engine. This bulletin announces the availability of reprogramming files for the Engine Control Module (ECM). This logic was developed to address the following Diagnostic Trouble Code (DTC): P062F - Internal Control Module EEPROM Error.
• 11021258Jul 10, 2025Electrical system. "This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance concerns possibly resulting from an undetected A/C refrigerant leak.
• 11021255Jul 10, 2025Brakes, Electrical system. This bulletin announces the availability of new reprogramming files developed to address cases of DTC C1C40 being detected by the Electronic Brake Booster (EBB) in addition to Failure Detail Code 30A2 stored within the Freeze Frame Data (FFD).
• 11019953Jun 27, 2025Other or unknown. This announcment provides information on the release of the latest software updates to the Subaru Midtronics DSS-5000 Battery Diagnostic tool.
• 11019943Jun 24, 2025Other or unknown. This announcement is to bring attention to the OTA for In-vehicle service appointment scheduler and In-vehicle message center.
• 11019932Jun 24, 2025Electrical system. This Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
• 11019942Jun 23, 2025Electrical system. This Service Information bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance concerns possibly resulting from an undetected A/C refrigerant leak.
• 11018915May 29, 2025Engine, Electrical system. This bulletin announces the availability of reprogramming files for the Engine Control Module (ECM). This logic was developed to address the following Diagnostic Trouble Code (DTC): P062F - Internal Control Module EEPROM Error. If DTC P062F is detected by the ECM, perform the reprogramming procedure outlined in this bulletin.
• 11018914May 29, 2025Fuel system, Engine. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).
• 11018913May 29, 2025Electrical system, Brakes. This bulletin announces the availability of new reprogramming files developed to address cases of DTC C1C40 being detected by the Electronic Brake Booster (EBB) in addition to Failure Detail Code 30A2 stored within the Freeze Frame Data (FFD).
• 11018909May 19, 2025Other or unknown. The purpose of this bulletin is to provide replacement key and immobilizer information along with an overview of the Subaru Lock Information web-site.
• 11018908May 19, 2025Brakes. In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the front brake on 2019-24 model year Ascent models to 8 years (96 months) or 150,000 miles (whichever comes first) to address cases of front brake pulsation or squealing.
• 11018904May 13, 2025Other or unknown. This bulletin announces a design change to the knob of the center air vent grilles.
• 11018899May 13, 2025Electrical system. This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance concerns possibly resulting from an undetected A/C refrigerant leak.
• 11017466Apr 30, 2025Electrical system. This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
• 11017461Apr 29, 2025Electrical system, Body and structure. This bulletin announces availability of new door window regulator assemblies and door glass run channel seals in response to limited concerns of erratic operation of the anti-entrapment feature and / or the door glass either not closing or closing very slowly.
• 11017459Apr 28, 2025Body and structure. This bulletin announces a design change to the hood lock switch portion of the hood lock assembly.
• 11017452Apr 22, 2025Engine. This Bulletin announces the diagnostic procedures to be followed when diagnosing engine oil leakage on FA and FB type engines.
• 11017444Apr 22, 2025Transmission and drivetrain, Suspension. This bulletin announces design changes made to the rear axle hubs. These changes have been implemented to reduce cases water intrusion further leading to harmonic, humming, and grinding type sounds heard from the axle hub while driving.
• 11017438Apr 14, 2025Fuel system, Engine. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).
• 11016234Mar 31, 2025Other or unknown. This Bulletin announces availability of a User Guide and an informative video to supplement the recent releases to retailers of the SOA321152 and SOA321153 Terminal Test Kits.
• 11016230Mar 27, 2025Body and structure, Electrical system. This bulletin announces design changes made to the Power Rear Gate Drive (PRG) Unit to address concerns of the power rear gate being inoperative.
• 11016180Mar 27, 2025Fuel system, Electrical system. This bulletin announces availability of new combination meter reprogramming files developed to address cases of inaccurate fuel economy displayed on the Center Information Display (CID).
• 11016227Mar 24, 2025Electrical system. The following information announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed.
• 11016224Mar 24, 2025Engine. The purpose of this bulletin is to advise of SOA’s revised Catalytic Converter Recycling Program shipping procedure.
• 11016208Mar 18, 2025Visibility (wipers, defrost, mirrors), Body and structure. This bulletin provides additional examples, diagnostics tips and installation tips as helpful aids to be used when working with sunroof seals and sunroof frame assemblies on Ascent models.
• 11016207Mar 18, 2025Electrical system. This Service Information Bulletin details a new procedure for conducting a CommCheck on vehicles equipped with a GEN 3/GEN 3+ DCM.
• 11016206Mar 18, 2025Electrical system. This Bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concerns.
• 11016205Mar 17, 2025Other or unknown. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
• 11016204Mar 17, 2025Brakes. In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the front brake on 2019-24 model year Ascent models to 8 years (96 months) or 150,000 miles (whichever comes first) to address cases of front brake pulsation or squealing.
• 11016175Mar 13, 2025Visibility (wipers, defrost, mirrors). This bulletin announces availability of new door window regulator assemblies and door glass run channel seals in response to limited concerns of erratic operation of the anti-entrapment feature and / or the door glass either not closing or closing very slowly.
• 11016174Mar 6, 2025Body and structure. This Bulletin announces diagnostic procedures to be followed when working with a Power Rear Gate (PRG).
• 11016172Mar 6, 2025Electrical 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.
• 11016171Mar 6, 2025Other or unknown. This bulletin announces the design change made to the left and right A-Pillar trim panels which will address cases of loose fitment.
• 11014859Feb 18, 2025Engine. This bulletin announces the design change made to the exhaust manifold flange nuts. The material has been changed from a medium carbon steel to stainless steel.
• 11014858Feb 18, 2025Engine. This bulletin announces the design change made to the exhaust manifold flange nuts. The material has been changed from a medium carbon steel to stainless steel.
• 11014867Feb 17, 2025Electrical system, Visibility (wipers, defrost, mirrors). This bulletin announces availability of new door window regulator assemblies and door glass run channel seals in response to limited concerns of erratic operation of the anti-entrapment feature and/or the door glass either not closing or closing very slowly.
• 11014865Feb 17, 2025Engine. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).
• 11014852Feb 10, 2025Electrical system. "This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16."
• 11013551Jan 31, 2025Transmission and drivetrain. This bulletin provides guidance when diagnosing chain slip, judder, shudder, and hesitation concerns on the TR690 model CVT transmissions used in the models listed.
• 11013530Jan 31, 2025Other or unknown. This announcement is in regard to special service tool shipment will be shipped directly to the Subar retailers during February.
• 11013515Jan 31, 2025Visibility (wipers, defrost, mirrors). This bulletin announces availability of new door window regulator assemblies and door glass run channel seals in response to limited concerns of erratic operation of the anti-entrapment feature and / or the door glass either not closing or closing very slowly.
• 11013525Jan 28, 2025Electrical system. A head unit OTA will be available via cellular network for Mid and High Grade CP1.5 head units.
• 11013519Jan 18, 2025Electrical system. The following information announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed.
• 11013512Jan 17, 2025Fuel system, Electrical system. This bulletin announces the repair procedures to be followed when DTC P1449 (EVAP System Clog Detected) is detected by the Engine Control Module (ECM).
• 11012265Dec 19, 2024Engine, Fuel system. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).

← All problems reported for the 2023 Subaru Ascent