[fpena944]

Got this code on my 2011 Cayenne Turbo and unfortunately there seems to be very little about this code and how to fix it available online.

No symptoms on the car except for the check engine light being lit. I cleared it a couple of times but it pops back up pretty quickly.

Now this is where I'm confused. At first I was thinking maybe I need to replace the thermostat, but when I look at that there is no electrical connection on the unit so if there is a "heater" it doesn't appear to have any wiring associated with it.

My father was doing some diagnosing and did find a sensor beneath the intake plenum going into one of the coolant lines that appeared to be corroded and the wiring frayed. But when I go to look for this unknown part within the online parts catalogs I can't find it and not sure if that is the part that might need replacing.

Anyone have any idea what it might be? I'm shocked there is so little information online about it. I found one thread on RennTech but in that case the Cayenne was overheating. In my case it's driving just fine.

Anyone ever seen something like this before?

[Scott at Team Harco]

#17? Go up (back) to view other parts diagrams. AA does a good job of capturing Porsche parts diagrams.

http://www.autoatlanta.com/porsche-part ... ion=105-05

[fpena944]

#17? Go up (back) to view other parts diagrams. AA does a good job of capturing Porsche parts diagrams.

http://www.autoatlanta.com/porsche-part ... ion=105-05

Well the good news is that you identified exactly the part that we thought was a heater. But it ended up just being a temp sensor.

I don't think if this is going bad it would create that code, do you agree?

So if this isn't the part then where is a "thermostat heater" even located? Does such a thing exist?

[Scott at Team Harco]

#17? Go up (back) to view other parts diagrams. AA does a good job of capturing Porsche parts diagrams.

http://www.autoatlanta.com/porsche-part ... ion=105-05

Well the good news is that you identified exactly the part that we thought was a heater. But it ended up just being a temp sensor.

I don't think if this is going bad it would create that code, do you agree?

So if this isn't the part then where is a "thermostat heater" even located? Does such a thing exist?

Generic code descriptions don't always make sense. I would investigate the wiring first. Once that is made/ confirmed satisfactory, and the fault returns, consider replacing the sensor. You'll likely need the clip, if it's not metal.

[fpena944]

#17? Go up (back) to view other parts diagrams. AA does a good job of capturing Porsche parts diagrams.

http://www.autoatlanta.com/porsche-part ... ion=105-05

Well the good news is that you identified exactly the part that we thought was a heater. But it ended up just being a temp sensor.

I don't think if this is going bad it would create that code, do you agree?

So if this isn't the part then where is a "thermostat heater" even located? Does such a thing exist?

Generic code descriptions don't always make sense. I would investigate the wiring first. Once that is made/ confirmed satisfactory, and the fault returns, consider replacing the sensor. You'll likely need the clip, if it's not metal.

I think we figured it out. The temperature sensor needs replacing along with the wire leading to it and the plug. Figured while we're there we might as we replace the thermostat as well.

My impression is that this "heater" is actually built into the thermostat. Yeah these generic codes are no fun at all.

[Scott at Team Harco]

Well the good news is that you identified exactly the part that we thought was a heater. But it ended up just being a temp sensor.

I don't think if this is going bad it would create that code, do you agree?

So if this isn't the part then where is a "thermostat heater" even located? Does such a thing exist?

Generic code descriptions don't always make sense. I would investigate the wiring first. Once that is made/ confirmed satisfactory, and the fault returns, consider replacing the sensor. You'll likely need the clip, if it's not metal.

I think we figured it out. The temperature sensor needs replacing along with the wire leading to it and the plug. Figured while we're there we might as we replace the thermostat as well.

My impression is that this "heater" is actually built into the thermostat. Yeah these generic codes are no fun at all.

Possible translation issue, related to 'heater'. I would advise replacing all o-rings and non-metallic clips on the parts you plan to disassemble. Heat takes a toll on the life-cycle of these parts.

[fpena944]

Generic code descriptions don't always make sense. I would investigate the wiring first. Once that is made/ confirmed satisfactory, and the fault returns, consider replacing the sensor. You'll likely need the clip, if it's not metal.

I think we figured it out. The temperature sensor needs replacing along with the wire leading to it and the plug. Figured while we're there we might as we replace the thermostat as well.

My impression is that this "heater" is actually built into the thermostat. Yeah these generic codes are no fun at all.

Possible translation issue, related to 'heater'. I would advise replacing all o-rings and non-metallic clips on the parts you plan to disassemble. Heat takes a toll on the life-cycle of these parts.

That's the plan. Thankfully the parts we ordered include these components.

Will provide an update when we get around to fixing it whether it made a difference or not.