can fresh jump starting of battery (2 hours/10miles) or burnt fuse of horn/lighter cause this problem?thanks for all answers
Five most common reasons for your “check engine light being on”: Faulty Oxygen Sensor Loose / Missing Gas Cap Catalytic Converter Mass Airflow Sensor Misfiring Plugs
it can even be the gas cap needs to be replaced thats how i fixed my problem
those reasons will not trigger the light. it can be anything from a loose gas cap to severe catalytic converter damage. pull the codes and see where the issue is.
It is important to know the type of vehicle to make a correct diagnosis! Not the jump start.but yes, a blown fuse WILL cause a check engine light if it is powering a component of the OBDII system! And in this case it is very common to have the power for the OBDII connector on the lighter fuse with no power to the OBDII connector you can expect to see a bunch of communication codes (U1***) in the system (Wonder what the auto zone employee would do if he had no communication at the OBDII connector?) 1. Faulty oxygen sensor The sensor measures the amount of unburned oxygen in the exhaust and tells the car's computer how much fuel is in the tank. Would MSNBC Really print this without verifying the source? WTF?? Most common reason for the check engine light-#1. Catalytic converter efficiency P0420 #2 Misfire P03**, #3 EVAP system leak detected P04** #4 Lean codes P0171+P0174 and finally #5 O2 sensor!
pete's right actually, its an emissions problem, something with your emissions system isn't working correctly that list is pretty accurate but you need to also add in the EGR valve, that happens quite a lot as well, misfiring plugs, if bad, would result in a blinking CEL, an air pump for your cat could also cause the light again, quite common to happen where i live, bad cat, O2 sensors, anything thats releasing HC (unburnt fuel such as gas cap loose) NOx (oxides of nitrogen, when your cylinders get above 2,500 degrees Fahrenheit) or CO (carbon monoxide, byproduct of burning fossil fuels) coming out of your tail pipe, could be a ton of things go down to your local autozone and get the code read.
