Just for future reference, a lot of the new cars have self diagnostics and Nissans in particular are pretty easy to trouble shoot. I used to do this all the time with my Sentra and its called the "Pedal Dance", you just have to get a rhythm down or use a stopwatch because the timing has to be pretty accurate. After doing it a few times I could do it every time by just counting in my head. The QR25 engines are notorious for problems so I did this quite often in parking lots or friends houses when a random CEL would pop up. Pulling The Codes Without a Scanner 1 Turn the ignition key to the "On" position, without starting the engine. Wait three seconds. Depress and release the gas pedal five times in five seconds, then let the pedal up. Count seven seconds and then depress the gas pedal and hold it down for 10 seconds. As soon as the service engine soon light starts flashing trouble codes, let the pedal up. 2 Make a note of all the codes by counting the flashes. For example, if the light will flash four times in a row and pause for a second and begin flashing again, the first four flashes stand for the number 4; it will then proceed to the next number. (Basically 1 flash = 1, 2 flashes = 2, etc... and 10 flashes =0) 3 Cross-reference these number codes with a code sheet. Repair all the faults before resetting the computer. 4 Reset the computer and turn the service engine soon light off by repeating the first process completely, with one exception: When the pedal is lifted after pressing the pedal down for 10 seconds and the codes are flashing, depress the pedal again for an additional 10 seconds and the computer will reset. Also, if there are more than 1 code it will continue on and give the next code so after it blinks all 4 numbers out, it will have a long pause and give the next code. If there are no more codes it will just repeat the first code so you will want to watch AT LEAST 2 code sequences to make sure there are no more.