Cadillac XT4 2020 Owner's Manual

Also see for XT4 2020: Convenience/personalization guide

Cadillac XT4 Owner Manual (GMNA-Localizing-MidEast-13527545) - 2020 -CRC - 9/16/19INSTRUMENTS AND CONTROLS 113If the light stays on, or comes onwhile driving, there may be a problemwith the electrical charging system.Have it checked by your dealer.Driving while this light is on coulddrain the battery.When this light comes on, or isflashing, the Driver InformationCenter (DIC) also displays a message.If a short distance must be drivenwith the light on, be sure to turn offall accessories, such as the radio andair conditioner.Malfunction Indicator Lamp(Check Engine Light)This light is part of the vehicle’semission control on-board diagnosticsystem. If this light is on while theengine is running, a malfunction hasbeen detected and the vehicle mayrequire service. The light should comeon to show that it is working whenthe ignition is in Service Mode. SeeIgnition Positions 0 168.Malfunctions are often indicated bythe system before any problem isnoticeable. Being aware of the lightand seeking service promptly when itcomes on may prevent damage.CautionIf the vehicle is driven continuallywith this light on, the emissioncontrol system may not work aswell, the fuel economy may belower, and the vehicle may not runsmoothly. This could lead to costlyrepairs that might not be coveredby the vehicle warranty.CautionModifications to the engine,transmission, exhaust, intake,or fuel system, or the use ofreplacement tires that do not meetthe original tire specifications, cancause this light to come on. Thiscould lead to costly repairs notcovered by the vehicle warranty.This could also affect the vehicle’sability to pass an EmissionsInspection/Maintenance test. SeeAccessories and Modifications 0 226.If the light is flashing : Amalfunction has been detected thatcould damage the emission controlsystem and increase vehicleemissions. Diagnosis and service maybe required.To help prevent damage, reducevehicle speed and avoid hardaccelerations and uphill grades.If towing a trailer, reduce the amountof cargo being hauled as soon aspossible.