These instructions apply to the Porsche 911 Mk8 (992) 2019-Present.
For other models, please choose your vehicle here.
If the tyre-pressure warning has come on in your Porsche 911 (2019–present) — the 992 — after you’ve adjusted the pressures or changed a wheel, you handle it through the central display (PCM). The 911 uses sensors in the wheels and has staggered tyres (wider rears), so the correct front/rear pressures matter. Seeing the light after a cold night, a top-up, or a seasonal wheel swap is completely normal — it is the monitoring system doing its job, not a sign of a mechanical fault.
How It Works on This Car
The 992 runs a direct system: each wheel carries a sensor that measures actual pressure and temperature and sends it to the car by radio. Because the values are read live, the readout on the PCM tyre-pressure page shows a figure for every corner rather than a single warning lamp. The car also knows the front and rear tyres are different sizes, which is why you tell it which wheel/tyre profile is fitted after a change — that way it applies the right target pressure to each axle.
Before You Start
- Check the tyres cold — before driving, or after the car has sat for a few hours. Warm tyres read high and will mislead you.
- Use the correct front and rear figures. They are not the same; the wider rears usually take a different pressure to the fronts.
- Have the door-pillar placard or handbook to hand for the exact numbers, and remember loaded/high-speed figures may differ.
- Set every corner, including checking the spare or repair kit is in order, before you touch the display.
After Adjusting Pressures
For a simple top-up, no manual reset is needed — just drive the car and the system re-reads the corrected pressures.
After Changing Wheels or Tyres
- Set the tyres to the correct cold pressures (remember fronts and rears differ).
- On the PCM / multifunction display, open the tyre-pressure page.
- Select the correct wheel/tyre setting (e.g. road/track, summer/winter).
- Drive the vehicle to complete the procedure.
If the Warning Stays On
- Recheck every tyre against the correct front/rear figures — one below spec keeps the warning on.
- Pick the matching wheel/tyre profile after a seasonal or track-wheel swap; the wrong profile applies the wrong target.
- Drive a few minutes so the sensors report; the values do not always refresh the instant you switch on.
- Watch for a cold-morning dip — a corner that was fine yesterday can read low after a cold night and clear once the tyres warm.
- Suspect a slow puncture if one corner keeps dropping; the system is reading a real leak, so inspect the tyre rather than just re-topping.
- Still showing with correct pressures? A sensor may have a flat battery — look up the code on autodtcs.com.
What to Expect After
Once the pressures are right and the system has re-read them, the warning drops out and the PCM page shows a healthy figure at each corner. It should then stay off for the trip and beyond, only returning if a tyre genuinely loses pressure or you change wheels again. A sensor reporting temperature as well as pressure is normal — readings will creep up as the tyres warm on a run.
Frequently Asked Questions
How do I reset the tyre pressure warning on a Porsche 911?
After a top-up just drive; after a wheel/tyre change, select the correct wheel/tyre profile on the PCM tyre-pressure page and drive to confirm. The system reads the corrected values on the move and clears the warning once every corner is at or above its target.
Do the front and rear pressures differ?
Yes — the 911 runs wider rear tyres, so set each axle to its own figure. Using the front pressure all round, or vice-versa, will either leave the warning up or under-inflate an axle. Take both numbers from the door-pillar placard or handbook.
Why won’t it clear?
Usually a tyre still below spec, or the wrong wheel/tyre profile selected after a wheel change. A cold morning can also pull a borderline corner under target. Recheck each pressure cold, confirm the right profile is chosen, then drive a few minutes.
Do I need a tool?
No for a normal reset; a tool is only needed if a sensor is replaced. Setting the pressures, selecting the right profile and driving is all an owner has to do. A workshop tool comes into play only when a new sensor has to be taught to the car.
Why did the light come on after a cold night?
Air contracts as it cools, so pressures fall a little overnight and a borderline corner can dip under target. This is normal for a direct system reading live values. Top the affected tyre back to the cold figure and the reading recovers as the tyre warms.
Can I use one wheel/tyre profile for both summer and winter sets?
No — pick the profile that matches the wheels actually fitted. Summer, winter and track wheels can carry different target pressures, and selecting the wrong one leaves the car comparing against the wrong figure. Choose the matching profile each time you swap wheels.
If the warning came on with other lights, decode the code on autodtcs.com.
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