"Engine control fault, consult a workshop, driving permitted" - ok to track it?
08-22-2015, 07:44 PM
#76
Orthojoe -
Stab in the dark of generic codes, however, I am curious if in the 24 hrs prior to your P2181 registering, did you jack the car? I am wondering if it is coolant sloshing or forming bubbles that affects the coolant sensor function.
Stab in the dark of generic codes, however, I am curious if in the 24 hrs prior to your P2181 registering, did you jack the car? I am wondering if it is coolant sloshing or forming bubbles that affects the coolant sensor function.
08-22-2015, 10:18 PM
#77
Nordschleife Master
"Engine control fault, consult a workshop, driving permitted" - ok to track it?
Originally Posted by neuroguru
Orthojoe -
Stab in the dark of generic codes, however, I am curious if in the 24 hrs prior to your P2181 registering, did you jack the car? I am wondering if it is coolant sloshing or forming bubbles that affects the coolant sensor function.
Stab in the dark of generic codes, however, I am curious if in the 24 hrs prior to your P2181 registering, did you jack the car? I am wondering if it is coolant sloshing or forming bubbles that affects the coolant sensor function.
08-23-2015, 12:17 AM
#78
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Seeing this thread reawakened, thought I'd mention that I've put thousands of miles on the car since getting that code, and the code never came back.
08-23-2015, 04:49 AM
#79
I checked the coolant level when the engine finally cooled and it was reading low. They must have underfilled at the factory or dealer. It has under 5k miles and no leaks. I added distilled water and no recurrences yet after another hour of driving.
08-23-2015, 10:52 AM
#80
My car popped the engine control fault on me yesterday and, as it's a perfect day for driving (and dealer is not open), am looking to solve this ASAP. Curious as to why would you add water instead of coolant?
08-23-2015, 11:52 AM
#81
Nordschleife Master
"Engine control fault, consult a workshop, driving permitted" - ok to track it?
Originally Posted by Napoli
My car popped the engine control fault on me yesterday and, as it's a perfect day for driving (and dealer is not open), am looking to solve this ASAP. Curious as to why would you add water instead of coolant?
It is very important to use distilled water and not sink water. Since you probably only need to add a small amount,adding distilled water won't make any difference in the percentage of 50/50 mix found in your coolant system at the moment.
08-23-2015, 11:55 AM
#82
Rennlist Member
Short answer is it is easy to do and doesn't involve fluids that you would worry about falling on your paint or on the floor where your pet might lick it up. When just adding a bit, distilled water is the easiest/safest.
Long answer is it is super complicated, at least for my mind. Although coolant has a higher boiling point, it has a much worse heat capacity. I haven't sat and done the math to figure out ratios, but I suspect for summer driving you could run almost entirely (distilled!) water or at least a very aggressive water to coolant ratio and be okay (you do want coolant's anti-corrosion properties). The ratio specified by Porsche for GT3 Cups is one gallon coolant and the rest water. Thus far more water than coolant, not close to 50:50 (off the top of my head, the ratio approaches 80:20 water: coolant). That's for a car that isn't expected to freeze but otherwise is running at intense usage and thus heat generation.
The 50-50 ratio we use normally is to balance cold and hot since just about none of us drain our systems with the change of seasons and water freezing in the engine block is "bad".
Long answer is it is super complicated, at least for my mind. Although coolant has a higher boiling point, it has a much worse heat capacity. I haven't sat and done the math to figure out ratios, but I suspect for summer driving you could run almost entirely (distilled!) water or at least a very aggressive water to coolant ratio and be okay (you do want coolant's anti-corrosion properties). The ratio specified by Porsche for GT3 Cups is one gallon coolant and the rest water. Thus far more water than coolant, not close to 50:50 (off the top of my head, the ratio approaches 80:20 water: coolant). That's for a car that isn't expected to freeze but otherwise is running at intense usage and thus heat generation.
The 50-50 ratio we use normally is to balance cold and hot since just about none of us drain our systems with the change of seasons and water freezing in the engine block is "bad".
08-23-2015, 12:23 PM
#83
Great answers, guys. Thanks.
I just went to check my coolant level and the ball is sitting at minimum, which makes no sense to me. Why would I get an engine control default as opposed to a coolant level warning? And, since there is no detectable leak, why is it at minimum? Or, maybe I do have a leak?
I just went to check my coolant level and the ball is sitting at minimum, which makes no sense to me. Why would I get an engine control default as opposed to a coolant level warning? And, since there is no detectable leak, why is it at minimum? Or, maybe I do have a leak?
08-29-2015, 10:19 PM
#84
Three Wheelin'
"Engine control fault, consult a workshop, driving permitted" - ok to track it?
Had a fault in the morning after tracking my car.
5k miles. 9 track days. Rather than track it 2nd day, rainy today, I brought it to the dealer. Scan showed coolant system issue. Still trying to find root cause. May be thermostat or coolant valve issue.
5k miles. 9 track days. Rather than track it 2nd day, rainy today, I brought it to the dealer. Scan showed coolant system issue. Still trying to find root cause. May be thermostat or coolant valve issue.
08-29-2015, 10:55 PM
#85
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Was at COTA today. Someone's 991 GT3 shut down on the track. When trying to start it, won't even turn over. Cause unknown at this point. 
Meanwhile, I'm driving my cousin's 991 GT3, which feels EXACTLY like mine. Car is running great, despite being on track most of the day with both of us driving it. Fingers crossed for tomorrow.
Meanwhile, I'm driving my cousin's 991 GT3, which feels EXACTLY like mine. Car is running great, despite being on track most of the day with both of us driving it. Fingers crossed for tomorrow.
08-31-2015, 10:48 AM
#86
OK I just got mine back from Park Place. They said it was slightly low on coolant they did replace the thermostat. Dealer replaced two parts said they did thermostat to play it safe I'm out of state. Cars has 3100 miles running fine now? I could post the details of the service ticket if somebody wanted to see them. They had the car for 3 days.
08-31-2015, 11:48 AM
#87
OK I just got mine back from Park Place. They said it was slightly low on coolant they did replace the thermostat. Dealer replaced two parts said they did thermostat to play it safe I'm out of state. Cars has 3100 miles running fine now? I could post the details of the service ticket if somebody wanted to see them. They had the car for 3 days.
08-31-2015, 03:12 PM
#88
Rennlist Member
Was at COTA today. Someone's 991 GT3 shut down on the track. When trying to start it, won't even turn over. Cause unknown at this point.
08-31-2015, 06:47 PM
#89
Three Wheelin'
"Engine control fault, consult a workshop, driving permitted" - ok to track it?
Originally Posted by seapar
Had a fault in the morning after tracking my car.
5k miles. 9 track days. Rather than track it 2nd day, rainy today, I brought it to the dealer. Scan showed coolant system issue. Still trying to find root cause. May be thermostat or coolant valve issue.
5k miles. 9 track days. Rather than track it 2nd day, rainy today, I brought it to the dealer. Scan showed coolant system issue. Still trying to find root cause. May be thermostat or coolant valve issue.