Cadillac 2010 CTS Owner's Manual

Also see for 2010 CTS: Owner's manual Brochure Brochure Owner's manual

Instruments and Controls 4-25An emission system malfunctionmight be corrected.. Make sure the fuel cap is fullyinstalled. See Filling the Tank onpage 8‑52. The diagnosticsystem can determine if thefuel cap has been left off orimproperly installed. A loose ormissing fuel cap allows fuel toevaporate into the atmosphere.A few driving trips with the capproperly installed should turn thelight off.. If the vehicle has been driventhrough a deep puddle of water,the vehicle's electrical systemmight be wet. The condition isusually corrected when theelectrical system dries out. Afew driving trips should turn thelight off.. Make sure to fuel the vehiclewith quality fuel. Poor fuel qualitycauses the engine not to run asefficiently as designed and maycause: stalling after start-up,stalling when the vehicle ischanged into gear, misfiring,hesitation on acceleration,or stumbling on acceleration.These conditions might go awayonce the engine is warmed up.If one or more of theseconditions occurs, change thefuel brand used. It will require atleast one full tank of the properfuel to turn the light off.See Gasoline Specifications onpage 8‑50.If none of the above have madethe light turn off, your dealer/retailercan check the vehicle. Thedealer/retailer has the proper testequipment and diagnostic tools tofix any mechanical or electricalproblems that might havedeveloped.Emissions Inspection andMaintenance ProgramsSome state/provincial and localgovernments have or might beginprograms to inspect the emissioncontrol equipment on the vehicle.Failure to pass this inspection couldprevent getting a vehicleregistration.Here are some things to know tohelp the vehicle pass an inspection:. The vehicle will not pass thisinspection if the check enginelight is on with the enginerunning, or if the ignition isplaced in ON/RUN and the lightis not on.