MY 03 C320 WONT START SOMETIMES SO I TOOK IT TO THE DEALERSHIP IT HAS BEEN THERE FOR ALMOST 2 WEEKS AND THEY SAID THEY HAVEN'T FOUND THE PROBLEM YET BECAUSE THE CAR ALWAYS STARTS UP FOR THEM. THEY SAID THEY NEED IT TO NOT START SO THEY CAN CATCH A CODE FOR IT. IT'S BEEN 2 WEEKS ANDSINCE THE CAR DOESN'T START FOR ME SOMETIMES I BOUGHT AN OBD SO I CAN TRY TO GET A CODE MYSELF. SOMETIMES THE CAR CRANKS BUT DOESN'T START AND SOMETIMES IT STARTS THEN SHUTS RIGHT OFF. I NEED HELP ON HOW I SHOULD TRY TO CATCH A CODE FOR THIS? CAN I DRIVE WITH THE OBD CONNECTED THEN TURN IT OFF THENBACK ON TO CATCH IT LIKE THAT? THANKS FOR ANY INPUT

 

does the check engine light come on if not dont think u will get a code. u will only get a code if light comes on.

 

That's silly, if the car throws a code it stays in there until they are erased. Check pending codes, it may be another option on your scanner.There's one problem that does this that's common and relatively cheap to fix, the CPS and it rarely throws a code.

 

NO THE CHECK ENGINE LIGHT DOESN'T COME ON. THE LUXURY DEALERSHIP I BOUGHT IT FROM SAID THEY CANT'T GET A CODE BECAUSE ITALWAYS STARTS FOR THEM. SO I PICKED IT UP TODAY(STARTED RIGHT UP). DROVE ABOUT A 30MIN HOME, TURNED THE CAR OFF ABOUT 10MIN LATER HOOKED UP THE OBD AND THE CAR WOULDN'T START. I DIDN'T GET ANY CODES. I RECORDED THE INFO WHILE TRYING TO START THE CAR BUT I DON'T KNOW IF THAT INFO IS USEFUL. IT'S NOT THE MAF SENSOR OR THE CPS SENSOR BECAUSE I JUST HAD BOTH OF THOSE REPLACED. THANKS FOR YOUR INPUT ANY MORE IDEAS?