I have put a new cam chain tensioner on my gti and re timmed up the chain on my gti and now it drives fine but take 5 seconds or so to start but drives fine and has brought up the eml light if clear the cods it then starts up fine till you turn it off again then takes 5 second again to start and brings up the code 00022 cam position sensor? Can any one help? Could it be the sensor or a stretched chain?