A Subaru Forester TPMS reset should start with a tire pressure check, because the warning light is not always a sign of a fault. Set all four tires correctly first, then watch how the light behaves before you assume the system needs service.
A light that blinks and then stays on points to a system fault rather than low pressure. The exact Subaru Forester TPMS reset steps depend on your model and trim, so check your owner’s manual before you press anything.
Check Tire Pressure Before Any Reset
Set all four tires to the pressure listed in your owner’s manual or on the tire information label before you try anything else. The tire pressure warning reports pressure, so correcting the tires is the first real step, not an optional one.
- Check each tire with a gauge while the tires are cold, meaning the car has not been driven for a while.
- Compare each reading with the pressure in the owner’s manual or on the tire information label.
- Add or release air until all four tires match the listed value, then drive the car normally.
Adding air does not always switch the light off right away. Give the system some driving time before you decide the light is stuck. For many owners, a Subaru Forester TPMS reset begins and ends with a reliable tire gauge, such as one of the best tire gauges. A warning light is a prompt to check pressure, not a substitute for it. If a tire looks flat or the car handles oddly, stop and inspect it before driving on.
Where the Subaru Forester TPMS Reset Steps Are Listed
For a Subaru Forester TPMS reset, Subaru says the tire pressure warning light turn-off procedure is in the owner’s manual and a linked video, and that features vary by model and trim. The Subaru customer support article does not list button presses or a sequence in its text, so this article does not invent one. The support article’s photos show a 2020 Ascent Touring, not a Forester, which is one more reason to rely on the manual for your own model year and trim.
Look for the tire pressure monitoring section in the manual and match it to your exact model year and trim. Many owners searching for a Subaru Forester TPMS reset look for a button, but this article has not confirmed one for the Forester, so do not assume a button exists on your car. Steps differ by model, so the Subaru Crosstrek TPMS reset guide is a sister-model reference, not a substitute for your manual.
If the manual’s steps do not clear a light after all four tires are correct, the next step is a diagnostic check rather than repeated button presses.
Blinking Light Versus Steady Light
A TPMS light that blinks 25 times and then stays on points to an ID registration fault, according to Subaru TSB 05-78-20, dated October 13, 2020. The bulletin describes DTC C2921, which is set when the tire pressure monitor ID registration has failed, and the warning light behaves in exactly that pattern. That makes it a diagnosis job rather than a Subaru Forester TPMS reset.
| Light pattern | What the bulletin covers | Next step |
|---|---|---|
| Steady light after all four tires are corrected | The bulletin describes only the blink-then-stay-on pattern | Recheck the pressure, then follow the owner’s manual |
| Blinks 25 times, then stays on | DTC C2921, ID registration failure | Have a technician read the trouble code |
| Light is off after the technician’s drive test | Only past faults are shown, and the bulletin says the system has returned to normal | No TPMS repair indicated by the bulletin |
The technician test in the Subaru TSB 05-78-20 bulletin drives the vehicle at 25 mph (40 km/h) or faster for at least 10 minutes, then reads the trouble code with Subaru Select Monitor. That is a professional procedure, and the bulletin is written for technicians only.
Which Forester Years the Bulletin Covers
TSB 05-78-20 lists DTC C2921 for 2020-21 model year Forester, while the 2019 Forester appears only in a bit translation table, not in the DTC applicability list. That split matters when you read the bulletin against your own car.
For a 2019 Forester, the bulletin provides only that table, not a confirmed DTC procedure. Use the owner’s manual for the Subaru Forester TPMS reset steps, and ask a dealer or shop to confirm any fault before you buy parts. Years not named in the bulletin should be treated the same way.
When a Shop Is Needed
If a blinking light stays on after tire checks, the bulletin points to professional diagnostic tools and, if registration fails, to replacing the TPMS. The four points below show when to stop trying home fixes.
- The light blinks 25 times and then stays on, which matches DTC C2921 in the bulletin.
- The light stays on after all four tires are at the listed pressure and you have driven normally.
- A diagnostic read is needed, and the bulletin names Subaru Select Monitor for that step.
- If ID registration still fails, the bulletin’s instruction is to replace the TPMS.
Ask the shop to read the tire pressure monitor codes and say whether the fault is current or only stored from the past. A diagnostic tool such as a TPMS tool can read sensor data, and some OBD2 scanners with TPMS support it too, but the bulletin names Subaru Select Monitor for its own steps. Ask for the code to be written on the invoice. A Subaru Forester TPMS reset that fails after tire checks is a diagnosis job, not a case for repeated button presses.
Check for TPMS Recalls
As of 2026-11-06, NHTSA recall data lists three recalls for the 2019 Forester, and none names the tire pressure monitoring system. Recall data changes over time and is specific to each vehicle, so check your own VIN before any Subaru Forester TPMS reset service or part purchase.
- Find the 17-character VIN on the dashboard or the driver-side door label.
- Enter the VIN on NHTSA’s recall lookup to see open recalls for your specific vehicle.
- Ask a Subaru dealer to schedule any open recall repair before you pay for a TPMS part.
Frequently Asked Questions
Do I need to reset the light after adding air?
Check all four tires against the listed pressure first. Adding air does not always switch the light off right away, so allow some driving before you decide it is stuck. In a Subaru Forester TPMS reset, the pressure check comes first. If the light still shows after correct pressure and normal driving, the cause needs a diagnostic check.
Is there a Subaru Forester reset button?
This article has not confirmed a reset button for a Subaru Forester TPMS reset. Subaru’s customer support article points owners to the owner’s manual and a video for turning the light off. Check the tire pressure monitoring section of your manual for your exact model year and trim.
Why does the TPMS light blink 25 times?
According to Subaru TSB 05-78-20, a light that blinks 25 times and then stays on indicates DTC C2921, meaning the tire pressure monitor ID registration failed. The bulletin treats this as a technician diagnosis, so a Subaru Forester TPMS reset at home is not the fix. Have the code read rather than guessing at the cause.
Does this bulletin apply to a 2019 Forester?
The bulletin’s DTC applicability lists the 2020-21 model year Forester. The 2019 Forester appears only in its bit translation table for reading TPMS status values. For a 2019 model, confirm the fault with a dealer or shop before you assume the DTC procedure applies to your Subaru Forester TPMS reset.
Is there a TPMS recall for the Forester?
For the 2019 Forester, NHTSA recall data checked on 2026-11-06 lists three recalls, and none names the tire pressure monitoring system. Recall data changes over time and is specific to each vehicle, so enter your VIN on NHTSA’s recall lookup to confirm open recalls for your own car.
Treat a blinking light as a reason to get the car checked soon, not as a light to ignore until the next service. If a check engine light comes on with the tire light, see the Subaru Forester check engine light guide. A steady light after correct tire pressure is worth a recheck and a look at your owner’s manual before you spend money on parts or on a Subaru Forester TPMS reset service.
