powdrhound

Hello there my fellow Cayenne gurus. I started the car (2006 Cayenne S) today and it was clearly evident there was a misfire present as the engine shook quite a bit while idling. In a few seconds the engine smoothed out and ran just fine. There was a check engine light that remained lit solid. I've driven the car several times today and everything was fine except the CEL light remained lit. I used durametric to get a scan of the fault codes and this is what it showed. I erased the coded and the CEL engine did NOT reappear after starting the car. Car runs perfect. Initially I thought I may have a coil pack or plug that is starting the act up but since durametric showed a misfire on ALL 8 cylinders, I'm not sure a coil pack or spark plug is the culprit. There is a VW part number 8SLVASN70000 and controller ID 0159 displayed at the top of the durametric page but not sure what that means. Any thoughts?

[url=https://flic.kr/p/q9SuWZ]

jumper5836

Your battery or part of the charging system could be on the way out. Not enough voltage right after starting. There are a few fuses if pulled will trigger misfire codes.
Coil packs or spark plugs all bad is possible but unlikely.

powdrhound

That makes sense. Once in a while when I turn the key to start the car the starter does not turn the engine over. After I turn the key off and restart it fires right up. Might be a bad contact on the battery, starter, or something along those lines. Could that initially cause a voltage drop on start up though resulting in the engine misfiring for a few seconds?

jumper5836

Could be your ignition switch. I think there is also a brake sensor that could go.