I thought I was being smart and bought a used 2011 Cayenne S Hybrid with only 88k miles for a good price. Had a dealer do their inspections for any major issues and finding none I decided to buy it. Here we are 6 months and only 5k miles later we are leaving dinner and the engine won’t start. Car throws a warning “hybrid system failure”. I’m already assuming the worst and it’s going to be a $10k battery replacement. Haven’t had it towed to the dealer yet. Has anyone seen or heard of this issue and know what I’m up against? I thought I had done my research well but I’m finding these cars have a myriad of issues.
‘11 Cayenne S Hybrid “hybrid system failure”
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Cayenne11
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I have a 2017 E-Hybrid and I have the red 'Hybrid System Failure'. Porsche had my car for almost a year because the battery 'failed' when they were repairing a separate issue. They refused to make good on leaving my hybrid battery out for weeks. They told me that I would have to replace everything which would be around 20K which I absolutely would not do. During this time, the 12V battery died and they never even thought about replacing it. I had the car towed back to me and I replaced it myself (took a while since I had to remove the driver's seat). Lo and behold (at least temporarily) the car started and the 'hybrid system failure' warning sign was gone. The hybrid battery had a charge (about 8 miles worth) and I was able to charge the car as well. This didn't last long as eventually that same day the system failure warning returned. I was able to get it running again after trying a number of times. I don't think the battery is gone because everything was the same (milage available, etc). I wonder if there is a connection issue.
I just had this issue and my car wouldn't start after acting funny for quite some time. This error would come and go, and one day it appeared and the car was inoperable. I towed it to the dealership, and they believe it's the 'hybrid engine control module' which Porsche provides a 20 year warranty on for some reason. They believed this was the issue because it has 45 error codes, but many of them centered around that module. Will replace that part and update as I get more information. Up until this point the car would never not start so this is a first for me.
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Updates would be quite useful!
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I've finally replaced the airco pump which was hybrid and had a short circuit. sounds strange perhaps but the hybrid will not start when the airco has this issue, this particular pump also works in electric mode too and has to be okay.
Hey man, I saw your post about replacing the AC compressor on the Cayenne hybrid, was it a hard job? I'm assuming it can be accessed from the bottom of car? I may have to do that job myself soon, either that or it's my 12v battery acting up. Appreciate your help!
How did they or u reset the hybrid system failure msg? But did your batter range dropped by a lot?
I managed to solved my issue. Turns out it was my radiator shutters that was stuck in the close position, causing the AC condenser to not get enough airflow, which would cause the AC compressor to shut down intermittently. Since the hybrid battery needs AC compressor for cooling, it would trigger the "hybrid failure" message. The radiator shutter actuator getting stuck is pretty common for cayenne and macans, so I just put it in the open position and now everything works perfectly.
How did you even arrive to the shutter was the issue. So far from what I research online. It can be like 20+ things. From 12v battery, to a $800 cable, to AC compressor, to different wire is lose, to now a shutter stuck close. U have any pictures? U did it yourself?
You have to get a Porsche compatible scanner and looked at the codes. My ECU had a code for active radiator shutters intermittently stuck, and I verified it by physically poking at the shutters and it was stuck. Without the scanner, there can be a million different things and you would just be guessing.
What scanner did u have?
Once I have the code, will it tell me the code issue? Or will I need to ask the dealer?
Thank you for the help. I will start here and go 1 step at a time.
Ok. So got the codes. Hybrid battery fault 5.
POAA600 - active/static - High-voltage system, insulation fault in MINUS harness warning stage 2
POAA600 - active/static - High-voltage system, insulation faultin PLUS harness - warning stage 2
POAA600 - active/static - High-voltage system, insulation fault - warning stage 3
POAA600 - active/static -
| High-voltage system, insulation fault in MINUS harness - warning stage 1 |
Before I cleared the code - there was 1 code that didn't come back after it was
P05A300 - Passive/sporadic -
|
P33F100 -
|
| 1J016400 - High Voltage A/C compressor - no communication |
C12033 - Communication with A/C compressor
Of course the 2 code - hybrid fault lamp Red
Hybrid fault lamp - yellow
Ok seems like there are 2 issues, 1. HV battery isolation fault, which might be caused by water engress in the trunk. A blocked sunroof drain can do that. Open the trunk compartment and inspect around the bottom of the HV battery, I bet there might be some moisture there. If so, the HV battery needs to come out and be inspected and modules may need to be replaced depending on how much water damage there are.
2. Radiator shutter may be stuck, which is the problem I had. You can check by going on a drive to fully warm up the car, crank AC to max, park the car, pop the hood so the engine stays running, and check front of the radiator to see if the blinds open or not. If they don't, then your AC might quit working when there's not enough airflow to the condenser, which will also trigger a HV battery error.
Thanks. On 2. I know the AC def works inside the car, or we are talking about the AC for the battery?
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