Inaccurate Tire Pressures Displayed in Combination Meter – 2017-2018 Subaru Impreza & 2018 Crosstrek

NHTSA ID Number: 10169853

Manufacturer Communication Number: 07-129-18R

Summary

“This bulletin announces availability of reprogramming files to optimize operation of the Tire Pressure Monitor System’s (TPMS) real-time display function. Under certain high-altitude conditions, the tire pressure values displayed in the combination meter may not be accurate. NOTE: The TPMS Real Time display is independent of the actual TPMS function. Should an actual low tire pressure condition occur, the TPMS indicator light will illuminate as expected.”

 

3 Affected Products

Vehicles

SUBARUeBay logoCROSSTREK2018
SUBARUeBay logoIMPREZA2017-2018

 


NUMBER: 07-129-18R
DATE: 01/30/18
REVISED: 12/31/19

APPLICABILITY:2017-2018MY Impreza
2018MY Crosstrek
SUBJECT:Inaccurate Tire Pressures Displayed in Combination Meter

 

INTRODUCTION:

This bulletin announces availability of reprogramming files to optimize operation of the Tire Pressure Monitor System’s (TPMS) real-time display function.  Under certain high-altitude conditions, the tire pressure values displayed in the combination meter may not be accurate.

NOTE: The TPMS Real Time display is independent of the actual TPMS function.  Should an actual low tire pressure condition occur, the TPMS indicator light will illuminate as expected.

 

PRODUCTION CHANGE INFORMATION:

The new logic has been incorporated into production per the table below:

Vehicle / ModelStarting VIN
Impreza 4-DoorJ*600016
Impreza 5-DoorJ*700017
CrosstrekJ*200121

 

PACK FILE APPLICABILITY:

NOTE:  These new reprogramming files are being supplied in the January 2018 SSM update.

Model / ApplicabilityPAK File
Name
New CM
Part Number
Old CM
Part Numbers
Decryption
Keyword
2017-18MY Impreza w/ KEY START88035FL02B_key.pk288035FL02B88035FL02A96D94E99
2017-18MY Impreza w/ PUSH BUTTON START88035FL02B_smt.pk25C18C26B
2018MY Crosstrek w/ KEY START88035FL021_key.pk288035FL02188035FL020C554D64A
2018MY Crosstrek w/ PUSH BUTTON START88035FL021_smt.pk29C379DEF

 

 

SERVICE PROCEDURE / INFORMATION:

IMPORTANT NOTES:

  • Always confirm (and correct as necessary) all tire pressures before performing this reprogramming.
  • To correct the TPMS display function, reprogramming of the Body Integrated Unit (BIU) will be required. A screen shot of the FlashWrite Search Condition display is provided below.  From the Search FlashWrite2 screen, select BIU from the ECM drop down menu.
  • Reprogram the BIU following the normal FlashWrite procedure.

SubarueBay logo of America, Inc. (SOA) highly recommends connecting the SubarueBay logo 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 DSTi 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 DSTi 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.

IMPORTANT:

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 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, as long as 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 as a result of battery discharge during reprogramming 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.

 

WARRANTY / CLAIM INFORMATION:

For vehicles within the Basic New Car Limited Warranty period or covered by an active SubarueBay logo Added Security Classic or Gold plan, this repair may be submitted using the following claim information:

Labor DescriptionLabor Operation #Fail CodeLabor Time
TPMS Control Module ReprogrammingA880-208UUZ-880.4

 

IMPORTANT:  Always note the original Decryption Keyword the vehicle came in with on the repair order before reprogramming and, make sure to list the NEW Keyword for any newly-installed programming (as confirmed from the actual control module AFTER installation).  The NEW Keyword 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.  If a newer version than what is listed in this TSB is shown as available in FlashWrite, reprogram using that file.

 

IMPORTANT REMINDERS:

  • 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.

NUMBER: 07-129-18R
DATE: 01/30/18
REVISED: 12/31/19

 


 

Bestseller No. 1
VXDAS TPMS Relearn Tool Only for GM Vehicles (2006-2024 Chevy/Buick/GMC/Opel/Cadillac) Original Sensor with 315/433 MHz, Tire Sensors Pressure Monitor System Reset Tool OEC-T5-2025 Edition
  • 🚗2023 UPDATED FOR WIDER COMPATIBILITY: Specifically designed to work with most GM vehicles 2006-2023 (Chevy / Buick / GMC / Opel /Cadillac and more) equipped with 315/433 MHz. Your vehicle deserves the best tire pressure sensor reset tool.(It is not suitable for heavy trucks with more than 4 tires or vehicles with an external TPMS system.)Tip:Based on factory and customer-tested models shown in A+, please refer to the car model list to confirm compatibility with the VXDAS TPMS tool.
  • SAVE TIME, SAVE MONEY: Tire pressure monitor sensor activation tool is quick, simple, and efficient. With a press of a button, activate your TPM sensors within 1-2 minutes, saving you trips to the dealer or a tire store.
  • 🚗ESSENTIAL, EASY TO USE TOOL: This tire pressure reset tool is essential for replacing tire pressure sensors, removing tire pressure alarms or changing tires. Simply ensure your vehicle is in TPMS Learn Mode, hold the tool against the tire sidewall near the valve stem, and depress the Learn button! Sensors should be original OEM sensors which well programmed.and make sure your tire sensor is full charged or is under good conditions before use our TPMS tool.
  • SUPERIOR QUALITY, SUPERIOR PERFORMANCE: Featuring a sensitive sensor chip for faster operation and an immersion gold process circuit board for stability. Our GM TPMS relearn tool is built for precision, accuracy, and durability.
  • MAXIMIZE SAFETY WITH TPMS RELEARN TOOL: Ensure optimal tire pressure with our TPMS Reset tool. Enhance safety and gain control on every journey, taking away the worries of tire underinflation!
Bestseller No. 2
VXDAS 2IN1 TPMS Relearn Tool Super GL50448 for GM and Ford with Model Switch Button,Tire Pressure Sensor Monitor Reset Activation for Buick/Cadillac/Chevrolet/GMC/Lincoln 2026 Edition(Green)
  • INNOVATIVE 2-IN-1 DESIGN: VXDAS TPMS relearn tool supports for GM and Ford series vehicles, (Buick, Cadillac, Chevrolet, GMC, Lincoln, Mazda, F150, F250, Focus, Fusion, and more). The added "G" and "F" model switch button on top makes it more convenient to use
  • COMPATIBILITY: VXDAS TPMS reset tool is compatible with vehicles equipped with the original tire pressure monitoring system based on 315/433Mhz. It is not suitable for heavy trucks with more than 4 tires or vehicles with an external TPMS system
  • ESSENTIAL TOOL: Use the VXDAS tire pressure relearn tool after tire rotation, replacement tire pressure sensors, tire pressure alarm light removal, or when changing between summer and winter tires. Reset in the correct mode for successful relearning
  • USER-FRIENDLY & COST-EFFECTIVE: Activate individual TPMS sensors quickly and easily by pressing the power button within 1 minute. Save $50-100 by turning off the tire pressure light yourself instead of visiting a dealer. Note: Requires a new 9V battery (not included in package) for optimal signal strength
  • TRUSTED & RELIABLE: Choose the VXDAS TPMS sensor tool, a reliable option trusted by professional mechanics and developed by experienced engineers. Ensure your vehicle's safety with accurate tire pressure monitoring
Bestseller No. 3
TPMS Relearn Tool, EL-50448 TPMS Reset Tool, GM Tire Pressure Sensor Orange
  • Applicable: TPMS programming tool is universal for most cars on the market (Chevrolet, Buick, GMC, Cadillac), such as sedan, SUV, pickup truck, etc. Please check the specifications of the reset tool before you buy to make sure it fits your vehicle
  • Features: The EL-50448 OEC-T5 TPMS tire pressure monitoring system activation and reset tool is an essential tool for activating and resetting tire pressure monitoring systems. It features a strong signal, fast response, and short activation time
  • Activate Reset: This is a tire sensor reset tool. With its powerful activation reset function, you can quickly and easily reset the tire pressure sensors, keeping your vehicle's tire pressure monitoring system in optimal operating condition
  • Function: This tire pressure monitoring system reset tool features clear TX and LOWBAT indicator lights for easy and correct operation. It is responsive and stable, quickly activating and matching tire sensors for accurate tire pressure readings
  • Easy to Use: Ensure your vehicle is in TPMS learning mode and follow the maintenance steps. Place the tool firmly against the tire sidewall, close to the valve stem. While the tool is firmly against the tire sidewall, press the learn button
SaleBestseller No. 4
Tymate TM7 RV Tire Pressure Monitoring System, TPMS Set of 4 Sensors
  • [Accurate Real-time Monitoring & Multi-Alert System]: Tymate TM7 tpms sensor can be used to monitor your tires’ pressure and temperature data within robust accuracy of ±1.5 PSI or ±3°F (The units can be displayed as ℃ or ℉ & BAR or PSI). Designed with six distinct alarm modes: high/low pressure, fast leakage, high temperature, sensor low battery, and sensor signal lost. This system is a reliable tool for maintaining tire health, and it is especially beneficial for DIY enthusiasts and pre-owned vehicle markets, where constant vigilance on tire conditions is paramount for safety and vehicle longevity
  • [Easy Plug-in Power & Dual USB Charging]: Tymate TM7 tpms sensors set of 4 effortlessly powers up by plugging directly into your vehicle's cigarette lighter socket, eliminating the need for complex wiring or professional installation. Ideal for older vehicles lacking factory-installed TPMS, providing a quick and efficient safety upgrade for drivers. Also, This innovative tire pressure monitor not only ensures your safety on the road but also features two USB outlets, allowing you to charge mobile devices like smartphones and tablets. A perfect solution for commercial vehicle operators and budget-conscious drivers seeking added functionality without sacrificing vehicle space or convenience
  • [Color LCD with Adjustable Backlight]: This device provides clear, easy-to-read tire pressure and temperature data in any light condition, thanks to the vibrant color LCD screen with adjustable backlight. This feature caters to all drivers, particularly those who commute daily or embark on long trips, ensuring visibility and readability at all times
  • [Wide Pressure Range Detection & Long Signal Transmission]: Tymate's TM7 TPMS accurately detects tire pressures from 0 to 144 PSI, offering versatility for a variety of vehicles such as sedan car, suv, mpv, pickup truck, rv, and travel trailer (The system automatically calibrates to the center tire pressure, using sensor installation pairing for reference values). This tire pressure monitoring system boasts a robust transmission range, and it ensures consistent, reliable connection between sensors and monitor. Note: We highly suggest to utilize this system with Tymate repeater for towing longer trailer(total length≥36ft), after pairing with repeater the monitor will display "RV" mode
  • [Easy to Use & Professional After-sale Service]: This Tymate TM7 TPMS is easy to setup in 5 minutes. The package box comes with comprehensive user’s manual and there are guide video available from the product page for you to follow steps by steps in the sensor pairing process. The sensors' battery replacing guide video is also available from listing, and the replacement sensor battery is CR1632 coin battery (4 coin batteries are included in the original package). If you still have any questions about the product, please contact us for further assists
Bestseller No. 5
JDIAG 2IN1 TPMS Relearn Tool Super EL50448 for GM and for Ford Tire Pressure Monitor Sensor TPMS Reset Tool, Tpms Programming Tool 2025 Edition
  • ✅ 2-in-1 TPMS Reset Tool for GM & Ford Series Vehicles:The JDIAG TPMS Relearn Tool is a must-have device designed for GM and Ford series vehicles, including Opel, Buick, Cadillac, Chevrolet, GMC, Lincoln, Mercury, Mazda, F150, F250, Focus, Fusion, and more. With its one-button operation, you can easily solve TPMS issues at home!
  • ✅ Wide Compatibility: Works seamlessly with vehicles equipped with an original tire pressure monitoring system (TPMS). Quickly enters TPMS learning mode and displays real-time pressure data for all 4 tires (based on 315/433MHz frequencies). Note: Not compatible with heavy trucks with more than 4 tires or external TPMS systems. Ensure that the vehicle is in the TPMS Learn Mode, and follow the service procedure. Please check the model of your car's brand and model.If not listed, it won't be compatible with your vehicle.
  • ✅ One-Button Smart Operation: Simply press the power button to wake up individual TPMS sensors within 1 minute. Easy to use, no professional skills required, saving you time and hassle.
  • ✅ Enhanced Signal & Energy Efficiency:Powered by a 9V battery (not included), tpms relearn tool delivers strong and stable signal performance for reliable operation. For best results, please use a new, fully charged 9V battery. Battery Alert: Swap batteries IMMEDIATELY when both LEDs flash to maintain peak signal performance.
  • ✅ Cost-Effective Solution: Save $50-100 per visit to the dealership! Reset your tire pressure light at home after tire rotation, sensor replacement, tire pressure alarm removal, or seasonal tire changes.

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