So I posted this back in September and since then I have completed the following and I'm still getting the same fault codes,
I have done:
New Battery
new coils/plugs
new cam position sensor

Here is the problem I'm getting:
So yesterday drove the Panamera (2010 S) to work zero issue, leave work and on start up get PSM Failure. So shut the car down and restarted got the same message and CEL came on this time also. Got home, car drove fine the whole time and scanned it and cleared the codes. Let it sit over night, this morning started again and PSM Failure again but no CEL. Drove to work fine again and when I shut it off and restarted the PSM and CEL came on. I scanned it and get the following.
P0016-cam shaft position
P0302 Misfire 2
P0304 Misfire 4
I cleared them all again and letting it sit till I'm off work today.
Any thoughts on where to start? TIA!!

Someone mentioned the timing chain? Is that really my last option before I either take it to a dealer and or drive it off a cliff?? LOL I really love this car and it just hit 98K right before all this starting and hoping to enjoy it for awhile longer and summer is (fingers crossed) right around the corner.

THANK YOU FOR ANY AND ALL HELP!!!

 

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Faulty injector(s) maybe?

https://www.6speedonline.com/forums/...m-failure.html

 

I don’t have a conclusive answer for you but I had a misfire(P303) this weekend and it ended up being a coil. I swapped it over to another cylinder and the problem followed. Pretty quick, easy way to check. I know you replaced them, but just because they’re new, doesn’t mean they can’t break. It would at least rule them out.

 

Wonder why the cam sensor… There are two right? Maybe the other one?

Maybe move the plugs and coils and see if the misfire follows. The coil bolts are one time use I hope you replace them with new ones…

My wife reported a PSM failure yesterday (sans Start/Stop disable this time). I have replaced the battery with a LiFePO4. Last time she had difficulty starting so I replaced the battery. That appears to have gotten rid of the Start/Stop warning.

(Now on to PSM like you. But for ours I suspect the growing amount of curb rash on the wheels may have something to do with it, maybe skewing input to the steering angle sensor. I have not had a chance to pull codes).

 

When is the last time you replaced coils and plugs? To me looks like you have to get them replaced now.
Let me guess - you drive in sport mode, right? or Sport +.
You get a misfire and your car will get PSM error immediately. Multiple errors will put your car into limp mode.
The cam error is because of the misfires. I saw same errors on mine when it was time to replace them.
I think Panamera replacement interval is 40k....I have threads about replacement intervals on here, just too lazy to look now.

 

I replaced those when this first started and I'm still getting the same error codes....

 

I would verify you got the specific coils. I replaced a set, was told they're for put, turned out, not. Use number from field Service manual.
call dealer parts and confirm uts the part number for your vin.
then, next step is to clear out all the codes. Then, pull codes to see exactly what they are.
thus ysing piwis2 or good diags package that can do this

 

Yup replaced all of them at the start of this but still getting the same misfires as prior, so I don't think the odds are high that brand new coils and plugs would be bad on the same cylinders that where misfiring prior...I'm at a loss here. Maybe fuel injectors like others have said? Do you know where to find a cylinder layout for this motor? Just so I'm sure which ones are what as far as number?

 

Find out which cylinders you are having misfires on.
Clear all errors from car (I assume youre using PIWIS2). If not using that , tell us what you are using to clear/read codes with.
Swap 1 of those coils + that plug, with ones from cylinders that you KNOW you are not getting codes on (do one coil at a time). Yes, will be time consuming.
After swap 1 coil, drive car. Try get error to pop us...could be couple days depending on how frequently you see the error.
If error occurs, find out which cylinder error is on. Did error move with the coil+plug? If yes, then its the coil and/or plug. Replace plug (cheap enough).
For coil, take a close look, for cracks, warps, etc. If none, separate from its boot. Is the spring dirty or bent? Measure impedance of the coil with ohmmeter and compare to known good coil impedance (resistance).
Repeat for next coil/plug pair after you sort out which is bad.


Other questions to ask yourself are
- what type of gas are you using ? From costco? even if highest octane? I learned my lesson and saw inside my engine after costco or wallie world gas....dirty...using name brand with cleaners or 7eleven gas as I believe they have contract with shell or chevron (dont recall). That gas was good after I looked under intake, after long time.
- are your coils plugs factory or other renomed quality and rated same? Just because old plug is in the car, does not mean its rating is factory. look up what plugs should be in car, compare to yours. Should be idential rating at least.
- same for coils. are they beru coils or some cheap made in north korea brand for 6 bucks a shot. Do not use anything other than beru. Beru has slightly different models on their site for coils. I use the FSM model of coils for the car, highest revision you can get. I thought I had a DIY for plugs. I included model of the coil/plugs used. For my year. Yours might be different if diffderent year/trim.
- what are you reading your codes with? PIWIS2? other? How detailed are the codes? Take a look to see if you see fuel pump errors. The HP fuel pump may be giving you trouble, but should have error for it before I would be worried about replacement.
For now rule out easy simple stuff. Then you need detailed scan and start going one by one, all possibilities.
PSM errors are coming up because your car is misfiring. Nothing to do with suspension. Misfires = fuel system problems = lack of fuel or lack of spark or lack of spark on time or lack of explosion or lack of explosion on time.
Plugs/coils answer if you you have proper delivery of electricity to create spark. Spark answers if you are able to actually create spark. Fuel type answers if spark is delayed or too early, etc.
HP fuel pump delivers fuel to engine...that answers if you get fuel to cylinders in proper amounts and on time...see start walking in your head what you see in codes, and start eliminating what you know it is not (or at least what you think is not).
Keep us posted.

 

The coils and plugs came from my Porsche Dealer they are Beru. As far as fuel I actually work in that industry and only been using Chevron 91, (93 isn't around my area 91 is the highest we have) maybe a bad batch? My code reader is a Foxwell NT530. I get the errors right on start up, I clear them and they come right back on the next start up. I'll grab two new coils and plugs just for Cylinder 2 and 4 and replace them and see what happens. If I'm correct that should be (looking at motor from the front) the first one down passenger side then second one down passenger side, correct? Thanks for your help!

 

Got the cylinder numbering figured out, new coils and plugs on the way. Update after I swap them and see what happens....fingers crossed!!

 

Did u find error follow one set? Yeah, keep posted. I was trying upload cyl numbering schem, but work so busy I literally left unsentimental then closed browser and it deleted. Hope u make progress.

 

I didn't move the coils since I figured I'd wait until the new ones show up so if they are bad I can just swap them then. Any where to find a pic of the motor without the engine trim on it by chance anywhere?

 

NA V8? I left the covers off. I can change the coils and plugs directly. It's dirty but I can take a picture of it maybe tomorrow morning. My wife took it to work...