[Wacky17]

Hi my name is David and i'm new to this forum. I recently bought a i30 and the tpms is blinking everytime I start the car. I've never owned a car with this technology. I have been checking the pressures and nothing has changed. I have even over inflated all tyres to 40 psi with no luck of the light turning off. I've pressed the reset button too. I have recently read that a blinking warning light can mean a faulty sensor or dead battery. Could having Michelin on the front and Pirelli on the back cause a problem? I'm booked in with the dealer for 17th april under warranty to check what the cause is. Is the car ok to drive for a long distant.

[Aye30]

Hi Just a thought, the fact that you have different brands on the car, would suggest that some tyres have been changed, Did they rotate in  the spare? and does it have one of the sensors in it? Are the valve stems all the same?  Some tyre shops yank the valve out when changing tyres, unaware they have sensors attached, and replace them with non sensor valves. And yes flat batteries in the sensors and uncoded sensors, damaged and 1 active sensor in the spare should give some weird indications.  Did the blinking light start recently, or has it been there since purchasing the car?  Also I would see if the TPMS detects a low pressure tyre, as that will give  a warning if the system is working, the 41 psi may not outside the expected range of the pressure monitor , but 5 psi definitely will be ( do not drive a car with pressures outside the manufactures recommended range).

[Wacky17]

Hi Just a thought, the fact that you have different brands on the car, would suggest that some tyres have been changed, Did they rotate in  the spare? and does it have one of the sensors in it? Are the valve stems all the same?  Some tyre shops yank the valve out when changing tyres, unaware they have sensors attached, and replace them with non sensor valves. And yes flat batteries in the sensors and uncoded sensors, damaged and 1 active sensor in the spare should give some weird indications.  Did the blinking light start recently, or has it been there since purchasing the car?  Also I would see if the TPMS detects a low pressure tyre, as that will give  a warning if the system is working, the 41 psi may not outside the expected range of the pressure monitor , but 5 psi definitely will be ( do not drive a car with pressures outside the manufactures recommended range).

Thank you for the reply. It does have new tyres on the front. I tested the pressures again today with a calibrated pressure tester my dad has and they are all 35 psi so they haven't gone down. I'm on the assumption that when they changed the tyres, they damaged a or both sensors or I have a bad battery. It's just annoying with a light on the dash as I've not had it for a week yet. Will have to see what the dealship find.

[Wacky17]

UPDATE: I couldn't wait for the car to go into the dealership on the 17th to find out what was causing the light to come. I found a simple solution online and gave it a try. I swapped the wheels so the same make of tyre was on the same axle. One press on the reset button and the light hasn't come on since. How sensitive these i30s are hey but glad I got to the bottom of it.

[BrendanP]

If it's similar to what I have on my 2015 i30, if the tyre valve detects zero pressure, like when a tyre is replaced, it has to be reset by inflating the tyre to the proper pressure, then driven around for a bit until the system 'learns' that what the valve is reading is the correct pressure. The low pressure alarm is activated when the tyre pressure falls a certain PSI below that nominal pressure, so it's vital all the tyre pressures are spot on when doing that initial calibration.

I've only ever had all 4 tyres replaced at a time, and the last time, the tyre fitter pumped all the tyres up to 40PSI because the manager told him to keep putting air in until the TPMS light went out (which is completely wrong). When I got home I deflated all the tyres, then pumped them all up to the correct pressure (36 PSI), drove the car around until the TPMS light went out after a few minutes. The low pressure warning gets triggered at around 32 PSI.