+18 Can Bad Spark Plugs Cause Check Engine Light Ideas. If the check engine light comes on, it’s important to take your car to a repair shop as soon as possible. Web if the check engine light is flashing, the spark plugs may be bad.
Check the engine code by plugging an obd code reader into the link connector port near the left side of your steering column to determine if the spark plug is. Bad spark plugs can cause your engine to misfire. When you’ve got a worn spark plug, it can’t produce the spark needed to start the combustion process.
