Checking your tyre pressures is a simple maintenance task that can improve safety, handling, fuel economy, and tyre life.
A tyre pressure gauge (digital or analogue), or access to an air pump with a built-in gauge
An air compressor or tyre inflator (if you need to add air)
Your vehicle's recommended tyre pressures
Look for the recommended pressures on:
The sticker inside the driver's door frame (most common)
The fuel filler flap (on some vehicles)
Your owner's manual
Use the vehicle manufacturer's recommended pressure, not the maximum pressure printed on the tyre sidewall.
For the most accurate reading:
Check the pressure before driving, or
Wait at least 3 hours after driving.
Driving warms the tyres and increases the pressure, which can give a higher reading.
Unscrew the valve cap from one tyre and keep it somewhere safe.
Press the tyre pressure gauge firmly onto the valve stem.
Hold it in place until the reading appears.
Read the pressure in the same unit (PSI, bar, or kPa) used in your vehicle's recommendation.
If the pressure is below the recommended value, add air.
If the pressure is above the recommended value, release a small amount of air by gently pressing the pin inside the valve, then recheck.
Repeat until the pressure matches the recommended specification.
Screw the valve cap back on securely to help keep dirt and moisture out of the valve.
Check:
All four road tyres.
The spare tyre as well, if your vehicle has a full-size or temporary spare.
Check your tyre pressures at least once a month and before long journeys.
Inspect the tyres for cuts, bulges, embedded objects, or uneven wear while checking the pressure.
If one tyre repeatedly loses pressure, it may have a puncture or a leaking valve and should be inspected.
If your vehicle has a Tyre Pressure Monitoring System:
It provides a warning when tyre pressure is significantly low.
It does not replace regular manual pressure checks.
If the warning light stays on after correcting the pressures, consult your owner's manual, as some vehicles require the system to be reset.
Never exceed the vehicle manufacturer's recommended tyre pressure unless instructed for a specific load condition.
If you're inflating tyres at a service station, check the pressure again with your own gauge if possible, as gauges can vary in accuracy.
If a tyre is visibly damaged or has lost pressure rapidly, avoid driving on it until the cause has been identified and repaired.