2003 Cadillac CTS Q&A
2003 Cadillac CTS Question: check engine on
check engine light is on - Visitor
If the Check Engine light/Service Engine Soon light illuminates while you are driving, the car's on board computer sees a fault in the engines management system that is causing an excess amount of pollutants to be emitted from your car. This could result in engine damage if left neglected. Some problems that can cause the Check Engine light to stay on may take two "drive cycles' to complete before illuminating the Check Engine Light. The computer sees a problem and looks for an identical set of circumstances to occur to confirm that it has indeed seen a problem before turning on the light. A Check Engine light that continually flashes while you are driving is serious and is a sign that the computer sees a problem that seriously risks damaging the catalytic converter which may result in an expensive repair or even may cause a fire! Diagnostic codes are stored in the vehicle's computer and can be retrieved using a scantool that communicates with the computer in your car. We have in our Repairpal website an encyclopedia with in depth articles about computer, and computer control systems, emission and driveability problems. http://repairpal.com/check-engine-light - patrick mannion
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Vehicles with certain V6 engines may illuminate the Check Engine Light one or more of the following codes: P0011, P0014, P0021, P0024, P0341, P0346, P0336, or P0391. Our technicians tell us that s...
our check engine light stays on. the diagnostic shows transmition trouble. no one can find problem. car runs fine for over a year. had sensor replaced still stays on. now we can not get our PA vehi...
the check engine light came on and has not gone off.
engine check light came on and when i put the obd II the code came back p0128