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In my 2006 Porsche Cayenne Turbo (955), after the car is turned off and locked the hazard lights flash on the front and the back for about 40 seconds

After driving, I turn the car off and lock it with the fob. After the normal audio/visual lock cue, the hazard lights flash for 30-40 seconds after. They flash on the front and the back, and it does not matter what position the light control is in.

My car has 97000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hello. This is a problem within the vehicles control module. The main body control module that controls the lighting either has an internal hardware failure or an issue with the programming. I usually try reprogramming the system first and if that does not solve it then the module needs to be replaced. The dealer is the best place to take this vehicle for this type of repair.

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Consumer Reports` reliability surveys have also found that manufacturers with a lot of experience building turbocharged engines—Audi, BMW, Porsche—tend to have more reliable powertrains.
Because they use higher quality materials and components, and the labor required to fix them is also more expensive. That said, the Cayenne is one of the less expensive models to maintain – especially when compared to other SUVs on the market.
The Porsche 996 Turbo is a great vehicle. They are very reliable in stock form and can even support modifications to increase the output.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

In my 2006 Porsche Cayenne Turbo (955), after the car is turned off and locked the hazard lights flash on the front and the back for about 40 seconds
ANSWER : Hello. This is a problem within the vehicles control module. The main body control module that controls the lighting either has an internal hardware failure or an issue with the programming. I usually try reprogramming the system first and if that does not solve it then the module needs to be replaced. The dealer is the best place to take this vehicle for this type of repair.

Car won’t turn over. No lights come on when I turn it. Can’t even lock my doorsvor push the seat up or back.
ANSWER : Your probably correct, it sounds as though your battery is done. But it also sounds like you have charging system issues. I’m not sure that fixing your battery and charging system will solve the problem with the car shutting off, but it’s possible that it will and it’s a darned good place to start. By contacting Your Mechanic, you can have a technician come to your home or office to check out your car and help you figure out what to do next.

Battery light goes on when I start car then turns off, if I rev engine light comes back until rpms go down. Abs goes comes on/off
ANSWER : Batteries can die due to faults in the charging system so ideally a suspected "faulty" battery should be load tested before a decision is made to condemn it. The only exception to this rule is if the battery is already clearly "old" (greater than 5 years) but even then once you put a new battery in, as a replacement for a "dead" battery, you have to comprehensively check out the charging system. Diagnostic Trouble Code P0460 will result in disruption of the dashboard fuel gauge’s ability to accurately report your tank’s fuel levels. The fuel gauge readings may be erratic, or read somewhere off scale. Vehicles equipped with a low fuel warning light feature may also suffer from erratic low fuel warnings in the event of a code P0460. Unless the P0460 code has been reported alongside other trouble code, all of the vehicle’s essential systems should otherwise function normally. I would recommend that you request a check engine light diagnostic to first resolve the fault causing the P0460 code to set. The check gas cap light warning light could be due a faulty gas cap and/or small leaks in the EVAP system.

My car stalls at times, yesterday the car shut off at a red light. I turned car off then back on now engine light is on.
ANSWER : This may be a result of a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. Since this valve is controlled by the vehicle’s computer, it will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed with the help of the idle air control valve making the transition from a higher RPM back down to idle speed. When the engine RPM drops below the normal range of about ~800 RPM, this often times will cause the engine to stall indicating a dirty or faulty idle air control valve. I would recommend having an expert from YourMechanic come to your location to diagnose and replace your idle air control valve.

Driving, then engine/oil light turns on, steering locks up, car dies; but just fine after turning off than on.
ANSWER : Any time loss of steering, or power assist to the steering is lost, it can be a safety issue and should be looked into as soon as possible. If the oil light and/or check engine light are flashing before it stalls, it can be a few different issues causing this. Also, a fault code may be stored in the system. Warning lights flashing after the engine stalls is normal. Most engine control units monitor readings from the oil pressure switch as well as the dozens of other sensors. Make sure the engine oil level is correct. If the oil pressure switch is intermittently losing it’s signal, then the ecu may think there is no engine oil pressure and shut down as a safety measure.

Have a certified technician look into the engine stalling as soon as possible. Losing steering and brake assist can be a safety hazard.

Battery and oil light come on when trying to start car, take keys out try again car starts no problem and lights go away
ANSWER : Of course, don’t switch gears without being fully stopped, unless your Owner’s Manual or the manufacturer has alternative advice. However, the gear shift issue has no relation to the no-start problem you are describing. Inasmuch as you only have 6,000 miles on the car, the "constant on and off" that you believe has occurred is meaningless in comparison to the expected total vehicle service life. That is, assume what you perceive as "constant on and off", during merely 6,000 miles, might be equivalent to using the car "normally" for three years. A new car should be trouble free for at least 5 years, unless there is a defect, so your "constant on and off" is not a causal factor for any fault on the vehicle. What you might have is a defect in the ignition switch, or perhaps the immobilizer system, but if the problem is not in the switch itself, clearly there is an electrical problem.

If your vehicle is under warranty, by law the dealer MUST repair the issue you are describing within a prescribed time frame and number of "attempts", otherwise the dealer will run afoul of Federal and state Lemon Laws that give you very specific rights, and recourse (contact an Attorney; we are Mechanics, NOT attorneys). Consequently, if the vehicle is still under warranty, to save yourself money do be sure to seek a resolution from the dealer. If the vehicle is not under warranty, obviously a certified Mechanic from YourMechanic could identify the electrical fault and resolve this for you. If you want to go that route, please simply request a no start diagnostic -electrical system and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Okay so when I turn my lights on at night my brake lights do not work, when I don’t have my lights on they work fine.
ANSWER : Hi there. Based on your inquiry, it’s highly probable that you have a damaged light switch or some electrical fault inside the turn signal relay. However, it’s also possible that the brake switch above the brake pedal could also be the source of your problem. Due to the fact that multiple electrical components might be causing this issue, it’s a smart idea to first have a professional mobile mechanic complete a brake lights are not working inspection, so they can determine what’s causing all of these issues and recommend the right repairs.

Security light constantly on or flashing, battery light flashes, radio locked, power locks and dome lights don’t work. Please help
ANSWER : Hi there, thanks for writing in. I’d be happy to provide my insight.

I would not replace the BCM without a thorough diagnosis first. GM vehicles such as yours suffer from two small wires that break in the steering column. They attach to the ignition lock cylinder that is part of the security system. But this doesn’t cause all the other power problems and the car will crank every time. If the security system is acting up, you can turn the ignition in the run position for ten minutes. If the car starts after ten minutes, then you most likely have a security issue.

The first thing I would do is to connect a scanner and see if I could communicate with all the computer modules. This will be a good indicator of whether or not the BCM is failing. In addition, any codes that are stored could be retrieved and these are very often excellent guides as to what is the problem.

If I were working on your car, I would look at all the connections that supply power to the fuses. This will require a repair manual or access to a professional level automotive information system. Following this, I would study a wiring diagram to see if there is a common connection that supplies power to all of the systems that are not working.

When it comes to computer modules, they are rare to fail. For this reason, I rule out every other possibility first before I suspect and then begin to directly test the suspected module. I recommend the following inspection to help you diagnose your car: Electrical problems are not working inspection.

Hope this helps, and best of luck.

Good luck!