2012 Dodge Grand Caravan Owner Manual - Page 294

UNDERSTANDING YOUR INSTRUMENT PANEL 291 tires or wheels on your vehicle, to ensure that the 9. Malfunction Indicator Light (MIL) The Malfunction Indicator Light (MIL) is part of replacement or alternate tires and wheels allow the TPMS an onboard diagnostic system, called OBD, that to continue to function properly. monitors engine and automatic transmission conCAUTION! trol systems. The light will illuminate when the key is in the ON/RUN position, before engine start. If the bulb The TPMS has been optimized for the original does not come on when turning the key from OFF to equipment tires and wheels. TPMS pressures and ON/RUN, have the condition checked promptly. warning have been established for the tire size equipped on your vehicle. Undesirable system opera- Certain conditions, such as a loose or missing gas cap, tion or sensor damage may result when using re- poor fuel quality, etc., may illuminate the MIL after placement equipment that is not of the same size, engine start. The vehicle should be serviced if the light type, and/or style. Aftermarket wheels can cause stays on through several of your typical driving cycles. In sensor damage. Do not use tire sealant from a can or most situations, the vehicle will drive normally and will balance beads if your vehicle is equipped with a not require towing. TPMS, as damage to the sensors may result. 4