A check engine light means the ECU found a fault it cannot fix on its own.<\/strong> The fault can be minor, like a loose gas cap. It can also be serious, like an active misfire. The first thing to look at is how the light behaves.<\/p>\n A steady<\/strong> light means \u201cget it checked soon.\u201d A flashing<\/strong> light means \u201creduce load now.\u201d Everything else follows from those two states. Then you read the code, check the basics and decide whether to drive on.<\/p>\n This decides how fast you must act.<\/p>\n \u26a0\ufe0f WARNING:<\/strong> A flashing check engine light means raw fuel may be reaching the exhaust. That can overheat and destroy the catalytic converter within minutes. Do not accelerate hard or tow with a flashing light.<\/p>\n<\/blockquote>\n Do these first. They cost nothing. They solve more cases than most people expect.<\/p>\n Write down what you noticed. This helps the diagnosis later.<\/p>\n Check Engine Light On \u2013 Can You Keep Driving?<\/a><\/p><\/blockquote>\n
\nStep 0: Steady or Flashing?<\/h3>\n
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\n \nLight behavior<\/th>\n What it means<\/th>\n What to do<\/th>\n<\/tr>\n<\/thead>\n \n Steady, car drives normally<\/td>\n A fault was stored. Often emissions related<\/td>\n Check the basics, read the code within days<\/td>\n<\/tr>\n \n Steady, car runs rough or loses power<\/td>\n A real fault is affecting performance<\/td>\n Reduce speed, diagnose soon<\/td>\n<\/tr>\n \n Flashing<\/td>\n Active misfire that can damage the catalytic converter<\/td>\n Reduce load, stop driving as soon as it is safe<\/td>\n<\/tr>\n \n Light plus red oil or temperature warning<\/td>\n Possible engine damage risk<\/td>\n Stop and switch off the engine<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \n
\nThe 60-Second Roadside Checks<\/h3>\n
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