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Newsletter March 2012

False TPMS Warning Lights

false TPMS warning lights

Recently an article appeared in Brake & Front End magazine citing KMA (KIA Motors America) having received inquires about false TPMS lights. While all of KIA’s owner manuals responsibly make note of possible RF interference, they are not the only manufacturers to do so. Dodge manuals similarly mention factors that affect proper TPMS function. Our experience has been that the same holds true for all TPMS applications.

Factors that can cause a false-negative resulting an erroneously illuminated warning light fall into two basic categories. The first is temporary environmental conditions that effect tire pressure. The second is radio frequency (RF) interference that impedes transmission or blocks reception of sensor and ECU signals.

 Prolonged driving under the following conditions can create increased tire pressure conditions:
  • Snow chains
  • Off Road
  • Unpaved roads
  • Poorly serviced roads (potholes)
  • Extreme cold
  • Extreme heat
Radio Frequency
In the following cases a TPMS light may be illuminated with or without Stored Diagnostic Trouble Codes (DTC) in Memory. In some cases these factors may cause multiple DTC.
  • Cell phone chargers
  • Laptop computers
  • Exciter tool connected while driving the vehicle
  • Portable navigational devices (GPS)
  • Aftermarket RKE, burglar alarm remote start systems
  • Aftermarket window tinting
  • Power inverters
  • Portable MP3 players
  • HAM radio equipment
  • High tension power lines and radio station towers
  • Vehicle anti-theft locating devices
  • Portable DVD players
  • Incorrect instrument cluster
  • Excessive aftermarket wiring tie-wrapped and coiled on or near TPMS module. This may create a magnetic field causing concern.

Always use the correct TPMS sensor part for the proper make /model /year. Using the wrong sensor can complicate repair and may be subject to warranty chargeback. To find the right sensor for your vehicle use our Application Guide

KIA Soul Manual

Findinf Ram Applications

Ram or Dodge

Starting with 2011 models, Chrysler LLC began marketing Ram trucks independent of the Dodge brand that had been its parent since 1981. For this reason, 2010 Dodge Ram applications and prior are listed in our Application Guide under Dodge and Ram applications 2011 and up are listed under Ram.

TPMS Preservice Checklist

TPMS Preservice Checklist

Our pre-service TPMS checklist helps you comply with the latest NHTSA guidelines and prevent TPMS problems before they become a repair shop liability.  It also assists you to pinpoint potential causes of TPMS failure.  This Printable TPMS Checklist PDF (72Kb) is an indispensible aid for daily on the job use in promoting TPMS sales and securing customer loyalty.  For details on the steps outlined in the PDF visit our checklist webpage complete with explanations.


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