i wanted to see if there were any hiden codes on my car.i did what the procedure said of jumping the ecu to read the codes.when i did it.the check engine and O/D light flashed together non stop.just flashing non stop, and not it the order if theer was a code.does anyone know what this means?

 

count the flashes for the cel. the o/d light flashes shows it is working.

once you count it, come back with your number.

I just did my cel, 21 = o2 sensor. 71 = egr...

now i need to get it fix

 

mine does non staop flashing with no pauses.is in the same speed like you were going to read the first #,but non stop