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Suspension 4th Gen Dodge Ram Suspension Problems and Questions


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  #1  
Old 05-14-2010, 11:29 PM
fu2010 fu2010 is offline
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Cool TPMS PSI Inaccurate

I just bought a 2010 Laramie with 20" 6 spoke wheels and the dealer changed them out with 20" 5 spoke wheels off a Sport at my request, both had TPMS sensors. They didn't break the tires down and change sensors but they said they "reprogrammed" the vehicle so it would recognize the new wheels/sensors.

My EVIC PSI reading is off from what my tire gauge PSI reads (it's a reliable tire gauge). Tire gauge says all 4 tires are exactly 35 PSI, EVIC readings are: LF 39 PSI, RF & LR 38 PSI, and RR 37 PSI.

I just got the truck last night with 19 miles on it and it now has 45 miles. Does the TPMS have to relearn the new PSI??? I know it takes a minute or so for the pressures to update after it's sat overnight but I've driving my new Ram 25 miles and it's sat running in the drive for several minutes. The EVIC PSI changed while I was driving last night but are not accurate. I thought the readings would be right by now???
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Old 05-15-2010, 01:04 AM
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Yes, it should have recognized the new TPMS units by now. Something's not right here. Back to the dealer with you!
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Old 05-15-2010, 01:54 PM
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Welcome to the forum! Glad to have you here!
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Old 05-15-2010, 05:11 PM
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Well... turns out my truck doesn't have a problem, I do. I assumed that the TPMS would read the actual tire pressure if you start the vehicle sitting in the drive without moving the vehicle, because the TPMS on my Acura will. Turns out the TPMS on the RAM will retain the last readings until it is moving, about a 1/4 mile or so.
Guess I'm just being paranoid thinking this truck is too good and something has to be wrong with it, it's awesome. I'm a 1st time Dodge owner;-)
Anyway, Thanks for the welcome, I'm glad I found this forum, there's some pretty cool stuff here.
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Old 04-18-2011, 02:19 AM
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They relearn when you start driving. Usually over 40km/hr for a couple minutes will do the trick
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Old 07-04-2011, 02:25 PM
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Quote:
Originally Posted by fu2010 View Post
Well... turns out my truck doesn't have a problem, I do. I assumed that the TPMS would read the actual tire pressure if you start the vehicle sitting in the drive without moving the vehicle, because the TPMS on my Acura will. Turns out the TPMS on the RAM will retain the last readings until it is moving, about a 1/4 mile or so.
Guess I'm just being paranoid thinking this truck is too good and something has to be wrong with it, it's awesome. I'm a 1st time Dodge owner;-)
Anyway, Thanks for the welcome, I'm glad I found this forum, there's some pretty cool stuff here.

In my truck I can take air out of the tire and the PSI in the Evic will drop after a couple of seconds
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Old 07-04-2011, 02:39 PM
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2 different processes for training the Ram TPMS, step 1 must be done using either method

1. Inflate all tires to correct pressure specification as indicated on the Vehicle Tire Placard.


2. Park vehicle with the ignition switch set to the off position for 20 minutes.


3. Drive the vehicle faster than 15 mph for at least 20 minutes. The sensor locations and ID numbers will be automatically registered during drive cycle.


During this reset period the instrument panel TPMS indicator may be illuminated. This is normal unless the indicator is flashing. It will turn off after a period of driving at a sufficient speed, usually 1-20 minutes at speeds more than 15-20 mph. If your initial drive is too short, the process will reinitiate the next time the vehicle is driven.


• Alternate Procedure: Perform the TPMS sensor initialization procedure using a scan tool. This will turn off the instrument panel TPMS indicator.
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