When I have all 4 wheels cold and I measure the tirepressure with the car´s system one of the sensors show between 0,6 - 1,8 more than the rest. When dubblechecked with an external measurer there is no difference. The result when the car is used is that I get "high tire pressure"-alarm all the time. Does anyone have a tip on what to do?

 

The sensors are designed to measure accurately when the
car is moving but it sounds like you have too much air
in the tires. They should be 30psi cold or in the low 30's.

 

 

Well, im having trouble with one of mine as well on my 04 its showing 25psi no matter whats in it.

 

I have 245/35-19" front 27 psi and 285/30-20 rear 28 psi and one sensors alarm all the time

 

Me too - my one sensor shows 28psi when all were set to 32.

 

Get a high quality digital tire guage and check all the pressures. Should be at 30 psi cold. If you still get a wide range of readings, you may need to reprogram the sensors. It may help.

 

Reprogram the sensor..........

Are reprogram the sensor not only for right place for sensor, LF RF RR and LR not too calibrate the pressure range of readings?

 

No, retraining the sensors only makes sure they are communicating with the receiver - it does not calibrate their pressure readings.

The thing that worries me about your problem is that the sensors only report the pressure, I believe it is the computer that determines that the reading is too much pressure, or not enough pressure. When you have driven your car for at least 20 minutes (and are still driving it) what is the pressure reading on the DIC for the sensor you are having trouble with - if I remember the limit for a high pressure warning is more than 40 psi.

 

After 20 minutes and still driving LF get alarm from 2,92 and up

 

Hi Mickelina,

This is good news I hope. If you told me you were getting an alarm when you were getting a reading around 2,06 I would worry about the computer, but if the DIC is showing that the pressure of the LF tire is at 2,92 and higher, I think the computer is doing what it should - 2,92 is around 42 psi.

I think we need to be sure we are using the same measurement system, and that I am converting the right way, so here is a web page that converts between metric pressure and the system used in the US - which is called Pounds Per Square Inch - pressure converter.

The recommended pressure when the tires are at the outside air temperature is 30 psi. If you use the calculator and put 30 in the Pound per square inch (psi) field then click somewhere on the page it will show you the proper value for your measurement system, which I think is around 2,06, but I would like you to check that I am using the right conversion.

If I am guessing on the right conversion it sounds like your alarm is sounding at what the computer thinks is a tire pressure around 42 psi, which would be a high pressure for the tires. Since you measured both of your front tires at 27 psi (1,86?) with an external pressure gauge when they were cold, I would suspect that the tire pressure sensor in the left front wheel is not sending the computer the correct pressure reading - it is sending one that is high, and I think it may need to be replaced to work properly. This is better than having to replace the computer

What do other people think?