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[kcobra]

I recently got my summer tires put on. They are basically stock run flats on 18 inch M wheels.

Over the past few weeks, I got a message on the main panel that looks like an exclamation mark within a tire.

I freaked out thinking something was wrong. Went through the manual, and discovered that the run flats needed to be re-calibrated. Easy thing to do in the car, you just have to follow the instructions. Takes a few seconds if you read the manual.

The problem is it has happened a few more times.

Has anyone else experienced this? Any thoughts as to why the cpu wants to keep calibrating the tires.

Keep in mind I am in Montreal, and there are way too many pot holes, so maybe that's throwing the system off. Or maybe, they didn't install the tires right...

[EINSER]

Could also be an alert for low tire pressure. Make sure you check the pressure in all 4 tires because the run flats will not look low like normal tires.

[2AD Tanker]

If you adjust the tire pressure in any way + or - you need to reset the TPMS.

[Tom K.]

Originally Posted by kcobra

Has anyone else experienced this? Any thoughts as to why the cpu wants to keep calibrating the tires.

By initalizing the system, you aren't calibrating the tires - you are simply telling the FTM that the current state of inflation is what you want to be considered as normal. If you properly inflated all 4 tires after the first warning, a subsequent warning would indicate that at least one tire was low.

So as EINSER said, the first thing to do is to check your tire pressures.
Tom

[cagekicker]

i would agree with the tire pressure.

[warmtoes]

Definitely check your tire pressures but remember KCobra is in Canada and we do not have TPMS. The scenario that might be that it was initiated when one of the tires was low already which may cause it to go off multiple times.

[Jackdaws]

The tire sensor is the only problem I've had with the car. I went to dealer three times and tire pressure light repeatedly came back on after reset, once three blocks from dealer. Instead of just resetting the sensor on the stalk, which is easy to do, the dealer had to replace the actual sensor/radio emitter in the left front tire--no problems since. These things communicate by radio waves, not wires.

[Tom K.]

Originally Posted by warmtoes

Definitely check your tire pressures but remember KCobra is in Canada and we do not have TPMS. The scenario that might be that it was initiated when one of the tires was low already which may cause it to go off multiple times.

Right - you guys have the older FTM system which compares wheel rotation speeds. But if he has "re-calibrated the tires" which I interpret as initializing the system as per the manual, wouldn't that tell the computer that the pressures are OK? If so, then a subsequent warning should indicate either that another tire is low, the original offender has leaked even more air, a bad sensor, or someone is surreptitiously adding air to one or more of his tires!

Either way, he needs to get a good air pressure gauge and check them the old fashioned way.

Tom

[BForbes]

Moving to tire section...