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sprinkles08, ASE Certified Technician
Category: Chrysler
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Experience:  ASE Master & Advanced level certified, Chrysler Master Certified, Trans and Hybrid Specialist
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Wifes 2004 Pacifica keeps getting Service Tire System Soon

Resolved Question:

Wife's 2004 Pacifica keeps getting "Service Tire System Soon" light on the dashboard. When we take it to the Chrysler dealer it either stops happening or they can't figure out why it's on. We have checked the tire pressure and they claim to have "retrained" the tire sensors with magnets. Our extended warranty runs on 7-11 and if this isn;t fixed by then we're going to end up paying for whatever this problem is. Anyone?
Submitted: 4 years ago.
Category: Chrysler
Expert:  sprinkles08 replied 4 years ago.

Hello and welcome to JustAnswer!

 

Any time the light comes on there will be fault codes stored in the module that controls the pressure monitoring. If all tire pressures are set at 36 PSI when the light is on then it's pretty likely that you have a problem with one of the sensors, and it will have set a fault code (a fault code setting is the sole reason the light illuminates).

 

You may have a sensor that is bad, or one that has a low battery. The batteries in the sensors do have a finite life, and yours is coming to the age where the batteries will be low enough to set this message off. The batteries are part of the sensor, and a sensor with a low battery would need to be replaced.

 

It's going to be a matter of connecting a scan tool to the vehicle and retrieving the stored fault codes related to the tire pressure system. As long as the battery isn't disconnected between the time the light comes on and the time you get to the dealer, the codes will still be stored.

Customer: replied 4 years ago.
Any idea why the message would come on one day and then go later? This is going to sound weird but it comes on when it's dry and then if we have a lot of rain and drive through standing water, it goes off. Last week we had a lot of rain here and the message was off the entire time it was wet. Then it dried out and the message came back on. It's the most exasperting thing.
Expert:  sprinkles08 replied 4 years ago.

If it's a low battery it's hard to say why it would come and go like that. A low battery should keep the message there until the sensor is replaced.

 

If a sensor just wasn't producing a signal intermittently, then that would explain why the message could come and go. There are also trigger modules in the system, which read the signal from the sensors in the wheels. Any of these could cause the problem also.

sprinkles08, ASE Certified Technician
Category: Chrysler
Satisfied Customers: 17402
Experience: ASE Master & Advanced level certified, Chrysler Master Certified, Trans and Hybrid Specialist
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