SpawnyWhippet

Hi all,
I recently bought a 05 CTT with 80k miles. It was running a little rough, so I changed the plugs, under seat battery and a coil pack that was giving an intermittent misfire code on cylinder 3.

Today, after a 75 mile highway drive, the Check Engine light came on. I pulled the following codes with Durametric, any ideas what I need to check?


Bosch Digital Motor Electronics 7.1.1
Current Fault Codes

P0344: Camshaft Position Sensor "A" Circuit Bank 1 or Single Sensor - No signal/communication, test conditions are not-completed, fault is not currently active and is not causing a DTC light

P1119: Implausible signal, test conditions are not-completed, fault is not currently active and is not causing a DTC light

P1119: Implausible signal, test conditions are not-completed, fault is not currently active and is not causing a DTC light

P0016: Crankshaft Position Camshaft Pos. Correlation Bank 1 Sensor A - Value below lower limit value, test conditions are not-completed, fault is currently active and causing a DTC light

P2329: Air Leak Between MAF and Throttle Body - Upper limit value exceeded, test conditions are not-completed, fault is currently active and is not causing a DTC light

P0300: Random/Multiple Cylinder Misfire Detected - Implausible signal, test conditions are not-completed, fault is not currently active and is not causing a DTC light

P0303: Cylinder 3 Misfire Detected - Implausible signal, test conditions are not-completed, fault is not currently active and is not causing a DTC light


Porsche Stability Management (PSM/ABS)
Current Fault Codes
1314: DME control module. Please read out fault memory

Vehicle Electrical System
Current Fault Code
(red exclamation but no error message)


I am not an expert with the Durametric, so I couldn't see how to get more info on the PSM and Vehicle Electrical System codes.

hahnmgh63

Good chance you have a cracked hose or vacuum line but after changing the battery I would start by clearing all of the codes then drive it for a day and see what comes back then work from there.

SpawnyWhippet

Thanks, these codes are all new as I cleared all of them when I did the coil pack and spark plugs last week.

The hose suggestion sounds promising, but looks like there is more going on with all the misfires, camshaft errors and DME. I guess that needs a smoke test, which I don't have at home.
Anything else I could check before I take it to a specialist?

Tots

Have you tried to replace the crankshaft position sensor? Looks like to me that the codes are pointing to it. All the other codes may be a secondary effect from it not working right.

Bank 1 Sensor A -

SpawnyWhippet

Thanks, but after a lot of work and troubleshooting, including replacement of the drivers side turbo, the issue turned out to be the timing chains had stretched and the Bank A timing was out of whack with Bank B. I had previously replaced cam and crank position sensors to rule them out.

It was diagnosed using an automotive scope, which clearly show the timing waveforms were not synchronized.

Only solution was to tear the engine down and replace all of that. After already throwing many of thousands into the car, I decided to sell it cheap.

J'sWorld

Absolutely no way the chain had stretched @ 80K. I'm guessing the same techs that diagnosed everything else gave the final diagnosis? Curious how much you sold for and was it to the dealership?

SpawnyWhippet

No, different techs (independent Porsche specialists) and they showed me the oscilloscope traces while the engine was running. The turbo was also 100% certainly failed - the housing had a large crack that allowed all the air to escape instead of blowing it back to the manifold. I replaced the coil packs, spark plugs, crank and cam sensors myself, with no changes.
I sold it on Craigslist for $7k in February 2016 (lost over $15k on it). The car look, smelt and drove like a 12 month old car with 5k miles, other than the check engine light. Its probably still driving around now with someone who doesn't care about that light being on all the time. I am driving a 2012 Land Rover LR4 instead. After 3 bad Cayennes in a row, I have had enough of them.

mr_hyde

Mis-post in the wrong thread - I apologize.

CRoger

Hi,

the valve lift solenoid is controlled by the results of the o2 sensors. If you have multiple errors like this, it could be a slow old o2 sensor. I would advise you to ask a good mechanic to analyse the o2 sensors. Because "try and error" is to expensive $$$