2019 Cayenne fails to start
03-07-2019, 11:28 PM
#46
More new tech going into these cars regardless of brand is going to have issues like an iPhone. We are essentially driving computers that will have a higher failure rate. Why do you think the Land Cruiser has the highest reliability rate...they are smart and wait for other companies to workout all the bugs before they implement that tech into their vehicles and that’s why the a new Land Cruiser seems dated and lacks all the “cool tech” found in Mercs, etc. I’ve owned 2 LC 200series and put over 100k on each without a single issue. They are just as much fun driving on pavement as a Porsche
03-08-2019, 05:32 AM
#47
Interesting theory. Our VIN is in the 80000 range. We've had various electronic issues -- PCM blue-screen that required a battery disconnect to resolve; false warnings and hardware disablement messages that fix themselves on restart; multiple settings and presets "forgotten" -- but no electrical issues as LMB has experienced.
Patek2301, what specific problem(s) has your friend had with his Cayenne?
Patek2301, what specific problem(s) has your friend had with his Cayenne?
03-08-2019, 07:43 AM
#48
Agree that with a new model some things may happen. However, as mentioned Porsche has some experience with the Q7 as well as the new Panameras. So alot of these should be worked out. I think the case LMB has is an isolated one, imho.
03-08-2019, 09:13 AM
#49
My dealer has one or maybe two cases that appear to be like mine. This just happened in the last week.
03-08-2019, 12:51 PM
#50
Although it's a hassle, and many like to avoid service, or hope their issues will go away, or prefer to let others bring their vehicles in for service to discover the fix, it's best if everyone who has this, or any other major issue have the issue looked into and documented by the dealership as the info goes back to the manufacturer. The more cases Porsche receives the more attention the issue gets and the sooner it is resolved for all.
03-08-2019, 12:55 PM
#51
The Q7 wont get the 3.0 turbo motor (has a s/c'd 3.0) until MY 20, the Q8 has it now, but I have yet to hear about this issue on the Q8 forum. Kinda of strange only the CY has been affected, I wonder what's different in it's application vs the Q8?
03-08-2019, 04:13 PM
#52
I mentioned the Q7 due to the electronics not engine.
03-08-2019, 04:19 PM
#53
03-08-2019, 04:26 PM
#54
Well yes Q8 is closer with some. But like HUD for instance is available on the Q7, as well as PCM similarities. At the end of the day they all are under the VW Group, so they has alot of experience with all of these things. The Cayenne is not usually the guinea pig. However the LiFePO4 may be first in the Cayenne. We wil see how many others are having issues. I have not had any issues, but mine was a little later of a build.
03-08-2019, 04:44 PM
#55
Well yes Q8 is closer with some. But like HUD for instance is available on the Q7, as well as PCM similarities. At the end of the day they all are under the VW Group, so they has alot of experience with all of these things. The Cayenne is not usually the guinea pig. However the LiFePO4 may be first in the Cayenne. We wil see how many others are having issues. I have not had any issues, but mine was a little later of a build.
03-08-2019, 04:51 PM
#56
Burning Brakes
Based on my own direct experience with phantom startup system test failures throwing error codes, I can see exactly how this plays out. I’ve gotten errors about PAS or High-Beam Assist failing, but can drive right on, or fix with a restart. LMB’s incorrect battery voltage sensing strands him.
Bad design, Porsche. The correct decision tree should be: undervoltage sensed—>allow start attempt—>measure voltage on success—>keep car running if still low—>advise immediate service required.
03-08-2019, 04:56 PM
#57
The HUD is almost about it (no touch screen tech on the current Q7) and we have HUD in our current 17 Q7 3.0, and never any issues. The issues have been all DAS, and false malfuctions etc. Even though they are all VW, Audi has taken it on the chin due to Deisel Gate with the settlement pushing $30 billion thus far so Audi's attention to correcting things hasnt been stellar. What's your production date? Mine should be somethime in April...hope that will be late enough to cover the non-start issue.
03-08-2019, 05:02 PM
#58
Bingo! That new battery is the reason for LMB’s no-start issue. As mentioned elsewhere, if the PCM detects a voltage drop below a certain range with the battery, it disconnects the battery from the main power / starter circuit to prevent damage to the battery. The problem is, if that sensor is finicky and occasionally flat-wrong in the data it reports to the host, an erroneous reading can put your Cayenne on a flatbed, even though the battery’s charge is fine.
Based on my own direct experience with phantom startup system test failures throwing error codes, I can see exactly how this plays out. I’ve gotten errors about PAS or High-Beam Assist failing, but can drive right on, or fix with a restart. LMB’s incorrect battery voltage sensing strands him.
Bad design, Porsche. The correct decision tree should be: undervoltage sensed—>allow start attempt—>measure voltage on success—>keep car running if still low—>advise immediate service required.
03-09-2019, 01:07 AM
#59
On the other hand, if there is indeed a wider spread issue and later production vehicles were addressed for this issue, then that would mean Porsche knows what the fix is, but unfortunately that doesnt appear to be the case based uopn what the OP is experiencing, so keeping fingers crossed there's a fix coming out sooner than later and it will be done in time for my April build.
03-11-2019, 10:08 PM
#60
Burning Brakes
I've not had any major problems with my 2018 Panamera 4 E-Hybrid, although not all of the minor features in the computer system work, and the diamond button doesn't always work.
My car has much if not all the complexities of the 2019 Cayenne, in terms of the computer system, and I have the added complexity of the electric motors.
I've been debating between getting the 2019 Cayenne E-Hybrid or a 2019 Macan -- leaning toward the smaller Macan, but wondering now if the 2019 Macans may suffer from some of the same electrical issues that the 2019 Cayennes have...
My car has much if not all the complexities of the 2019 Cayenne, in terms of the computer system, and I have the added complexity of the electric motors.
I've been debating between getting the 2019 Cayenne E-Hybrid or a 2019 Macan -- leaning toward the smaller Macan, but wondering now if the 2019 Macans may suffer from some of the same electrical issues that the 2019 Cayennes have...