WTP-75 Impreza ECM Reprogramming – 2017 Subaru Impreza

NHTSA Campaign Number: 17V216
Manufacturer Subaru of America, Inc.
Potential Number of Units Affected 33,131


Loss of Fuel Pressure from Fuel Vaporization

An engine stall can increase the risk of a crash.



Subaru of America, Inc. (Subaru) is recalling certain 2017 Impreza vehicles. Winter fuels may vaporize prematurely in the fuel line, resulting in a reduction in fuel pressure, possibly causing the engine to stall.



Subaru will notify owners, and dealers will reprogram the engine control unit to turn the radiator cooling fan on at a lower temperature, free of charge.

The manufacturer has not yet provided a notification schedule.

Owners may contact Subaru customer service at 1-800-782-2738.

Subaru’s number for this recall is WTP-75.



Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.


Check if your Subaru has a Recall


DATE: 03/23/17
REVISED: 04/13/17


APPLICABILITY: 2017MY Impreza 4D & 5D
SUBJECT: WTP-75 Impreza ECM Reprogramming
Subaru of America, Inc. (Subaru) is recalling certain 2017 model year Impreza vehicles to update ECU software affecting the operation of the radiator cooling fan.



Due to software programming within the engine control unit, the operating threshold of the radiator fan used to cool the fuel temperature is not set low enough for the fan to operate at an appropriate temperature when using winter blend fuels.  When North American winter fuel, which will  vaporize at a lower temperature, is used, the fuel may begin to vaporize prematurely under certain outside temperature and low speed or stopped driving conditions.  Premature vaporization causes a decrease in fuel pressure.  If this occurs, the vehicle may experience a condition of rough idling, no-start or engine stall.  In some cases, if the engine were to stall, the driver may be unable to restart the vehicle for a certain period of time.  The engine may stall in certain circumstances while driving, including low speed, stop-and-go traffic, or at a stop and may not be able to be restarted immediately, increasing the risk of a crash.



The remedy procedure will be to reprogram the ECU with a software update.



Notification letters will be sent by first class mail to owners of all potentially affected vehicles.

Owner notification will occur April 2017. A copy of the letter is at the end of this bulletin.



Your Region/Distributor will provide you with a detailed list of affected new unsold inventory units.  If you have any of the affected models in inventory, please ensure that your sales and service staff are immediately notified that the unit(s) are un-saleable until the recall campaign is completed and the claim is submitted.

Model Years Models Production Start Date Production End Date
2017 Impreza 4D & 5D 09/13/2016 03/15/2017



Each Subaru retailer will receive an affected VIN list from their Zone Office when owner  notification begins. Vehicles will be assigned to retailers in the affected VIN list based on the  selling retailer. Retailers are required to limit the use of these lists for the purpose of completion of this safety recall.



Retailers are to promptly perform the applicable service procedures to correct all affected vehicles in their inventory. Additionally, whenever a vehicle subject to this recall is taken into inventory or in for service, necessary steps should be taken to ensure the recall correction has been made before selling or releasing the vehicle.

Any vehicles listed in a recall/campaign that are in the retailer’s stock must be:

  • Immediately identified.
  • Tagged or otherwise marked to prevent their delivery or use prior to inspection and/or repair.
  • Repaired in accordance with the repair procedures outlined in this Product Campaign

Please be advised that it is a violation of Federal law for a retailer to deliver a new motor  vehicle covered by a recall under a sale or lease until the defect is remedied. In addition, any Authorized Subaru Retailer failing to perform the applicable service procedures to correct all affected vehicles in their inventory prior to the vehicle being placed in service will be in breach of the Subaru Dealer Agreement.



This bulletin announces availability of reprogramming files to address customer concerns of an  engine idle drop, rough idle or in isolated cases, engine stall condition resulting from fuel  vaporization.  This condition may occur during extended engine idling periods or low speed driving (e.g. vehicle stuck in traffic).  In some cases, the Check Engine light may illuminate and store DTC P0087 in memory.  Fuel vaporization may occur when high under-hood temperatures are combined with the use of winter-blend fuels.  These fuels, which have a higher volatility than summer-blend fuels are specified for use during cool or cold ambient temperature conditions.  The new ECM logic includes optimized cooling fan control to reduce under-hood temperatures and eliminate fuel  vaporization.



Model PAK File Name New ECM Part Number Old ECM Part Numbers Decryption Keyword New CID Number
MT Model w/ AGS* 22765AJ59C.pak 22765AJ59C 22765AJ59A, 59B 28109783 XH3J110C
MT Model w/o AGS* 22765AK61C.pak 22765AK61C 22765AK61A, 61B A6D2B5EC XH3J110A
CVT Model w/ AGS* 22765AJ60C.pak 22765AJ60C 22765AJ60A, 60B 7778DADE XH3J110D
CVT Model w/o AGS* 22765AL71C.pak 22765AL71C 22765AL71A, 71B 5468730C XH3J110B

NOTE:  AGS = Active Grille Shutter

*Due to the number of pak file variations it is recommended to search FlashWrite  using the vehicles current ECM CID for the proper file to apply.





NEVER attempt to perform the WTN-74 audio update and any ECM programming simultaneously.  Only perform one system update at a time.

CRITICAL:  Always confirm the battery charge level BEFORE starting the reprogramming  procedure.  ECM damage WILL occur if the battery’s charge level drops too low during the  reprogramming process.  Charge the battery if needed.  Use of the Midtronics GR8 battery charger in power supply mode is strongly recommended.  The procedure for using this feature of the GR8 is provided below.

  • Reprogram the ECM following the normal Flashwrite procedure.

Subaru of America, Inc. (SOA) highly recommends connecting the Subaru Midtronics GR8  Diagnostic Battery Charger to the vehicle and utilizing the Power Supply Mode feature anytime  a vehicle control module is being reprogrammed.  Follow the procedure as outlined in document  GR8-1100 on STIS for use of the GR8’s Power Supply Mode:

  • Confirm all electrical loads such as lights, audio, HVAC, seat heaters, and rear defroster are all switched OFF before setting up for Power Supply Mode.
  • Select the correct battery type (Flooded, AGM or AGM Spiral).
  • Select the CCA which matches the vehicle’s battery (NOTE: OE and replacement batteries have different CCA ratings. Always confirm the battery rating before proceeding.)
  • If the “Charge BatteryWARNING appears, the battery MUST be charged before attempting reprogramming.
  • DO NOT connect the DST-i or SDI until the GR8 Power Supply mode has completed its battery test mode and the Charging Voltage has dropped to a steady 13.5 Volts on the display.
  • If the GR8 “beeps” or the Status Light flashes, a diagnostic charge should be performed on the battery before proceeding further.
  • Once Power Supply Mode reaches a steady 13.5 volts, connect the DST-i or SDI to the OBD connector and initiate the reprogramming process.


  • Amperage will fluctuate based upon the vehicle’s demand for power. NOTE: If the voltage rises beyond 14V while programming is in process, the procedure will abort. This can indicate a need to test or charge the vehicle battery before any further attempt at programming.


This information is applicable to the Midtronics GR8 Diagnostic Battery Charger ONLY. It does not apply to any other brand / type of “generic” battery charger WTP-75 Impreza ECM Reprogramming - 2017 Subaru Impreza 1 whatsoever.  ONLY the GR8 and its Power Supply Mode feature has been tested and approved by SOA.

Once the GR8 is connected to the vehicle, if the battery is fully charged, it takes less than 3 minutes to boot-up the charger, select Power Supply Mode, and have the battery voltage stabilized and ready for reprogramming.

REMINDER:  If the GR8 indicates the vehicle’s battery must be charged, charge the battery using the GR8 before proceeding to reprogram the vehicle.

NOTE:  Control module failures resulting from battery discharge during the reprogramming  procedure are not a matter for warranty.  Should any DTCs reset after the reprogramming update is performed, diagnose per the procedure outlined in the applicable Service Manual.



Credit to perform this recall will be based on properly completed repair order information.  Retailers may submit claims through Vehicle Claim Entry on Subarunet.com.

Labor Description Labor Operation # Campaign Code Labor Time Claim Type
WTP-75 ECM Reprogramming for P0087 A145-538 WTP-75 0.4 RC

IMPORTANT:  Always note the original Calibration Identification number (CID) the vehicle came in with on the repair order before reprogramming and, make sure to list the NEW CID for any newly-installed programming (as confirmed from the actual control module AFTER installation).  The NEW CID MUST also be noted on the repair order as this information is required for entry in the Miscellaneous Detail field during claim submission.

NOTE:  The pack file listings provided in this bulletin are the latest available at the time of publishing.  Updates are often released thereafter without revision to the original bulletin.  For this reason, it is critical to always have the latest version of Select Monitor software installed on your system.  You can confirm if a later version is available by entering the CID listed in this bulletin into FlashWrite.  If a newer CID is shown as available in FlashWrite, reprogram using that file.



  • SOA strongly discourages the printing and/or local storage of service information as previously released information and electronic publications may be updated at any time.
  • Always check for any open recalls or campaigns anytime a vehicle is in for servicing.
  • Always refer to STIS for the latest service information before performing any repairs.




This notice applies to the VIN identified in the address section printed below.


Subaru Recall Campaign WTP-75
NHTSA Recall No. 17V-216
April 2017


Dear Subaru Owner:

This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.


SUBARU OF AMERICA, INC. has decided that a defect which relates to motor vehicle safety exists in certain 2017 model year Impreza vehicles.

You received this notice because our records indicate that you currently own one of these vehicles.



The software programming of the engine control module (ECM) which operates the radiator fan is not set to a low enough temperature when using winter blend fuels. Therefore, such fuels may begin to vaporize prematurely under certain outside temperature and low speed or stopped driving conditions, resulting in reduced fuel pressure. If this occurs, the check engine warning light may illuminate and your vehicle may experience a condition of rough idling, no-start, or engine stall.

The engine may stall in certain circumstances while driving, including low speed, stop-and-go traffic, or at a stop and may not be able to be restarted immediately, increasing the risk of a crash.



To correct this condition, Subaru will reprogram the engine control module (ECM) with a software update. The new ECM logic includes optimized cooling fan control to reduce under-hood temperatures and eliminate fuel vaporization. This repair will be performed at no charge to you.


You should immediately contact your Subaru retailer (dealer) for an appointment to have this recall repair performed.

Be sure the check engine warning light located in the instrument cluster is not illuminated when the vehicle is running.  Immediately contact your Subaru retailer for assistance if the check engine light is ON.

If you prefer to make alternative arrangements for having your vehicle towed to your retailer, you may contact the Subaru Roadside Assistance Program at 1-800-261-2155. The repair and the towing will be at no cost to you.




The actual time to complete this repair is approximately 24 minutes.  Your retailer can provide you with a better estimate of the overall time for this service visit, as it may be necessary to have your vehicle available for a longer period of time.



If you have moved or sold your vehicle, please complete the enclosed prepaid postcard and mail it to us.  Or if you prefer to update this information online, please go to www.subaru.com, select ‘Customer Support,’ then select ‘Address Update’ or ‘Ownership Update’ under ‘Quick Links.’



To locate the nearest Subaru retailer, you can access our website at www.subaru.com and select ‘Find a Retailer.’ For additional information, please go to: http://www.wtp75.service-campaign.com.

If you need additional assistance, please contact us directly:

  • By e-mail:subaru.com, Customer Support and select “Contact Us”
  • By telephone: 1-800-SUBARU3 (1-800-782-2783)
    Monday through Thursday between 7:30 a.m. and 8:00 p.m. ET
    Friday between 10:30 a.m. and 5:00 p.m. ET Saturday between 9:00 a.m. and 3:30 p.m. ET
  • By U.S. Postal mail:
    Subaru of America, Inc.
    Attn: Customer-Retailer Services Department
    P.O. Box 6000
    Cherry Hill, NJ 08034-6000

Please contact us immediately if the Subaru retailer fails or is unable to make the necessary repairs free of charge.

You may also contact the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Ave.

SE, West Building, Washington, DC 20590 or call the toll-free Auto Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153) or go to http://www.safercar.gov if you believe the Subaru retailer has failed or is unable to remedy your vehicle without charge within a reasonable amount of time.

Your continued satisfaction with your Subaru is important to us.  Please understand that we have taken this action in the interest of your safety and your vehicle’s proper operation.  We sincerely apologize for any inconvenience this matter may cause and urge you to schedule an appointment as soon as possible to have this repair performed.


Subaru of America, Inc.

Notice to Lessors: Under Federal law the lessor of a vehicle who receives this letter must provide a copy of it to the vehicle lessee(s) within 10 business days from receipt. The lessor must also keep a record of the lessee(s) to whom this letter is sent, the date sent, and the applicable vehicle identification number (VIN). (For the purposes of this section, a lessor means a person or entity that in the last twelve months prior to the date of this notification has been the owner, as referenced on the vehicle’s title, of any five or more leased vehicles. A leased vehicle is a vehicle leased to another person for a term of at least four months.) A subsidiary of Fuji Heavy Industries Ltd.




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J2534 Reprogramming

Subaru reprogramming files using a generic (non-OEM) SAEJ2534 pass-thru vehicle programming device WTP-75 Impreza ECM Reprogramming - 2017 Subaru Impreza 1 WTP-75 Impreza ECM Reprogramming - 2017 Subaru Impreza 1 are available by contacting Service Technical Information Company toll free at 1-866-428-2278. The cost for the CD-ROM with all reprogramming files is $75.00 plus S/H and applicable state tax. Files will be updated four (4) times per year, in CD-ROM format, with all available reprogramming service information at the same above offered cost. Authorized Subaru Dealers are provided the same reprogramming information.

Before purchasing, the reprogramming details can be found in the following Reprogramming J-2534 Files chart. Click the link to view the PDF chart.

Subaru J2534 Reprogramming software meets the latest available J2534-1 specification. Our Reprogramming J2534 Files chart does not specify the Calibration Identification Number (CID); however, this information is included in our offered CD-Rom.

Note: The ECM or TCM being reprogrammed may already contain some or all of the reprogramming files listed in the Reprogramming J2534 Files chart shown by release date. It is possible to damage the vehicles ECM/TCM during the reprogramming event. Once the reprogramming process has started, it is recommended not to interrupt the process until the event is completed. If you experience any problems, please contact your scan tool maker for further instructions.

Are all pre-2004MY Subaru vehicles compatible with J2534?

No. Subaru has no reprogramming capability for model years 1996-1998. Starting with our 1999 model year, please see our Reprogramming Pre-J2534 Files chart for affected model reprogramming information.

Both pre-J2534 reprogramming and J2534 pass thru reprogramming files are included in the offered HDS kit software for aftermarket service provider application.



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