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For the past few months I've noticed my Cayenne having a low idle and engine vibration when coming to a stop. It pretty much happens all the time. Today the fault codes 0455 and 2404 came up indicating an evaporative system leak. My gas cap is tight so I'm thinking my vacuum pump is bad. I've got 179K miles on the car (no garage queen here) so I'm sure it could be worn out. Could this also cause the low/rough idle? thanks, Richard 09 Cayenne S PS - sorry if there is already a post on this topic but I couldn't find it.
Had a similar problem with my 09. Turned out to be a fuel pump going bad. Can't remember if it showed a code or not. It did it for about a month before it went out.
Turns out the coil was bad. I replaced it and she's running like a top. Cleared the error codes and they haven't come back in 45 miles or so. Thanks for the replies and advise!
Gosh I hope it's not the gasket. The dealer will never admit to messing that up.
The error code is showing cylinder 6. How do I determine which is # 6?
I have a 2009 Cayenne S with about 131K miles. Just spent $2700 replacing the fuel pump and thermostat so I'm not a happy camper. Today the engine started running rough and the check engine light is blinking. I hooked up the Durametric and got 3 error codes: 1352 Valve lift control cylinder 6 2A04 Mixture beh. cat. conv Bank 2 0306 DME control unit faulty: EEPROM no signal/comm I found some info on the P0306 code: Possible causes of OBD code P0306 A code P0306 may mean that one or more of the following has happened: Faulty spark plug or wire Faulty coil (pack) Faulty oxygen sensor(s) Faulty fuel injector Burned exhaust valve Faulty catalytic converter(s) Running out of fuel Poor compression Defective computer Where is the O2 sensor? I'd like to start with that. thanks, Richard