To all,
I have had the most annoying experience with my air pressure sensors on my crossfire. I've had the car for 3 months and I think the darn light has been on 1/4 of the time. I've checked the air pressure...even overfilled the tires but the light stays on. Right now I am driving with 35 Lb. pressure in the tires and the light came back on. I called the dealer to see what could be done and he said there was a way to recalibrate the sensor system. Does anyone know how to do this? Should I lower the air pressure to around 28 lb. to "re-train" the system what low really is? Any help or advice would be appreciated. Thank you.

 

I don't think there is any way to recalibrate the system yourself. It requires a tool that plugs into the car to read the data from the monitors as well as a calibration magnet that is placed at the wheel. I would take it to the dealer and make them do it.

 

I had the same problem. The dealer recalibrated the sensors and no more light.
What they need to do, and they should know it, is use a magnetic doughnut around each sensor while the computer is connected to the control box. If your dealer has a certified Crossfire tech, he will know what to do.

 

I've had the same problem with the tire pressure sensor. Had to bring it to the dealer 4 times. They tell me that temperature changes are causing the light to go on. Here's the rub, the dealer is trying to charge $22.50 each time they reset the sensor. Not only do I loose 4 hours from work, now they are charging for something I have no control over? Like I said in prior posts, these crazy problems make the owning of my Xfire a pain in the as*. I love the car, hate the Chrysler service and mentality.

 

Not sure what the dealer is trying to do to you here.

They tell you that it is the colder temp that is setting off the sensor (that may be true as I experienced that first thing in morning earlier this fall) and then they say they have to reset the sensor each time at cost. If what they say is true, why don't they or you just add a little more air to the tires and that should resolve problem.
If it is not true and you have a defective sensor or defective something else, why are they charging you anything. The warranty should take care of defective whatever.

Your right about the service and mentality of the dealer. If it's true what they are doing to you, they are simply taking you to the cleaners. I can't understand why they had to take you to the cleaners four times.

 

It's like a rock and a hard place. If my tires get low and the light goes on, when I add air, the light stays on and I have to bring the car to the dealer to reset the sensor at $22.50. If I bring the car in and they add air because of temp changes it's $22.50. I'd rather have them remove the sensors. Does all of this make sense to you?

 

No. When my light came on back in the summer for the very first time (car was delivered in April).
I figured I had some sort of tire problem. Sure enough, I had a nail in one of the tires with a very slow leak. Got it fixed and everything was fine until the colder early mornings and then the TPM light came on again. I checked the pressure in all tires and they were the same (normal) and then I found that the light would go out later in the day when the temp warmed up. That led me to believe that it was the temp condition causing light to come on in morning. This occurred a couple of times. I added two-three lbs. in each tire and the light never came on again. I now have the car put away in storage as of Nov. 1 so I don't know what the real cold temps would do.

I don't know why you have to reset the TPM if all your doing is adding a little air above the norm
to each tire. It seems to me that you may have a problem with one or more sensors and therefore the dealer should not be charging you for anything and in fact if this is proven, they should reimburse you for any previous charges.

Does that make sense?

I agree that the "rock and a hard place" is convincing the dealer to find the real problem with a minimal number of visits.

 

If there is a problem with the sensors they should fix it. I'm not at tech, so I'm at the mercy of the dealer. Too be clear, I haven't paid the $22.50 because I dispute the charge every time. It's a **** poor way to deal, try to stick the customer and if he makes enough noise, then waive the charge, instead of simply not charging. I have to argue every time I go in. It's a terrible way to do business.

 

I think your major problem is the dealer, not the sensors. The very best way to handle this is to contact Chrysler customer service and report the dealer. Second, I would ask chrysler what to do with the sensors. Third, I would look for a new dealer to service my car. Wherever you take your car, make sure they have a certified Crossfire Tech. They are well versed on the car after going through a long course of study. They also rcve the service alerts on any Crossfire problems. Lastly, adding more air to compensate is not good. The sensors are designed to go off with a loss of 25% air. That would mean you would need to overinflate your tires by about 8 PSI That is not recommended.
Hope this helps.

 

The problem is that the nearest other dealer is 50 miles away and they do not have a Xfire tech. I tried them once, ended up with damage on the under carriage that they refused to take responsibly for.

 

I agree that the problem is the dealer. My low pressure light came on shortly after I received the car. My dealer spent ten minutes recalibrating it, at no charge, and I haven't had a problem since.

 

Then you have one more route to take. As per Daimler-Chrysler's own representations, they say as part of the sales pitch, that the Crossfire will be serviced by a Crossfire specialist. If you have no specialist available to you, then you can demand that your car is serviced under warranty by your local Mercedes dealer, who really know this car the best. You should contact Chrysler customer at once.

 

Guys:
I have been driving my Xfire for the last 6 months and the light went on only once when it was about 45 degrees F. It was down a couple of pounds. No problems since and I have seen -12 F so far. I am going to drive all winter so I will let you know. Stan37, I think your advice is sound and I will use it if a problem comes up in the future with my car.
Thank You

 

You need to get a good digital tire gage and check tire pressures when the light comes on. If tire pressure is ok, the dealer should be correcting the problem, no charge under warranty. Too bad you didn't do this initially, the first time you had the problem. Actually, you should be checking tire pressures frequently anyway. With the low volume of air in these tires, they will be more affected by temperature changes, etc. than the standard tire.

 

To all,
To put this post to a close...it turns out that one of my air pressure sensors went bad. The dealer put me in a loaner, replaced the sensor, and all is well.

 

Something I've noticed with mine is that when it rains (infrequently here in AZ), the light invariably comes on. When the weather clears it goes away. I check the pressure religiously so the warning light means nothing / little to me.