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YOUR RESEARCHEngine Coolant Light was flashing...then stopped...anybody know why?
Reported or suspected cause
coolant tank leak
Reported cause
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Engine Coolant Light was flashing...then stopped...anybody know why?
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Leading evidence: 'coolant tank leak' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'coolant tank leak' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check coolant level and it was bone-dry almost' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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I then read the manual AGAIN and checked my coolant level and it was bone-dry almost.
Engine Coolant Light was flashing...then stopped...anybody know why?
Check system
Suggestion or failed attempt
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
Discussions
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion
Usually you will 'smell' coolant if the resoirvoir is cracked/leaking but look it over very well with a flashlight for crusty residue, then the cap, then check the water pump the same way look for residue or buildup around the puke hole...pressure check the system which will look at the coolant system entirely inc radiator/hoses..last but not least go to the sensor they can false fault ..if all the above ck out good change sensor...just do it
Engine Coolant Light was flashing...then stopped...anybody know why?
Check system detecting a momentary "low fluid" situation
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion
I think its caused by the check system detecting a momentary "low fluid" situation, which then rights itself.
Engine Coolant Light was flashing...then stopped...anybody know why?
Check water pump the same way look
Suggestion or failed attempt
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
Discussions
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
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Suggestion
Usually you will 'smell' coolant if the resoirvoir is cracked/leaking but look it over very well with a flashlight for crusty residue, then the cap, then check the water pump the same way look for residue or buildup around the puke hole...pressure check the system which will look at the coolant system entirely inc radiator/hoses..last but not least go to the sensor they can false fault ..if all the above ck out good change sensor...just do it
Engine Coolant Light was flashing...then stopped...anybody know why?
Check system
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Usually you will 'smell' coolant if the resoirvoir is cracked/leaking but look it over very well with a flashlight for crusty residue, then the cap, then check the water pump the same way look for residue or buildup around the puke hole...pressure check the system which will look at the coolant system entirely inc radiator/hoses..last but not least go to the sensor they can false fault ..if all the above ck out good change sensor...just do it
Engine Coolant Light was flashing...then stopped...anybody know why?
Check water pump the same way look
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Usually you will 'smell' coolant if the resoirvoir is cracked/leaking but look it over very well with a flashlight for crusty residue, then the cap, then check the water pump the same way look for residue or buildup around the puke hole...pressure check the system which will look at the coolant system entirely inc radiator/hoses..last but not least go to the sensor they can false fault ..if all the above ck out good change sensor...just do it
Engine Coolant Light was flashing...then stopped...anybody know why?
Replace sensor...just do it
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Usually you will 'smell' coolant if the resoirvoir is cracked/leaking but look it over very well with a flashlight for crusty residue, then the cap, then check the water pump the same way look for residue or buildup around the puke hole...pressure check the system which will look at the coolant system entirely inc radiator/hoses..last but not least go to the sensor they can false fault ..if all the above ck out good change sensor...just do it
Engine Coolant Light was flashing...then stopped...anybody know why?
Use correct coolant
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
If you have been using the correct coolant, then the coolant will be mostly clear and you can just shake the car a little and look at the side of the tank to see the fluid level.
Engine Coolant Light was flashing...then stopped...anybody know why?
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Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
17 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T031046Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I have a 99' C2 Cab and I am looking for a little help with the coolant light.
I was taking a little "Sunday" Drive today and the engine coolant light came on. It was flashing for about 20 minutes but the gauge was just about in the middle so I wasn't too concerned. I stopped the car, turned off the ignition and sat for about 5 minutes. When I restarted it the light wasn't flashing anymore and hasn't since.
Anybody have this happen before? What would cause this?
Thanks!
I think its caused by the check system detecting a momentary "low fluid" situation, which then rights itself. Exactly the same has happened to me, usually on a Sunday as well.
Spooky!
It could be a cracked coolant tank. I had the same problem on my '99 996. You should probably bring it to a Porsche Dealer for service. They will likely replace it for free under goodwill, as this is a common issue for the '99 996. If they charge, expect to pay $300-$400.
Flashing temp. light means a low coolant level. However it is also appears when the coolant system has a "bubble" in the system and needs bled. Read the DIY on Renntech.org about installing the third radiator as Loren goes into detail about how to purge and/or bled the coolant system. If that doesn't fix the problem then its time for a dealer trip.
The blinking coolant light codes are in the owner's manual. You may have a split coolant reservoir.
About 2 months ago I had the dreaded coolant reservoir tank seam split that plagues the 1999 model year cars. In addition to the new improved tank Doug ordered up 3 quarts of the Porsche certified coolant.
As posted previously he charged me for 3 quarts of Porsche coolant 00004330078 at $6.97 each. He charged me $184.78 for the coolant reservoir and $120 for the labor to replace the leaking reservoir, fill and bleed. I post this for your reference.
I've had this happen on my 2001 c4 a couple of times. Turned out to be a coolant tank leak... fixed under warranty, out of warranty I think it's about 600 bucks.
Yes I had the same problem...light would go on and blink and blink...the needle would be in the middle (normal) position. I would turn the car off...wait a min or two and re-start and the light would go away. I then read the manual AGAIN and checked my coolant level and it was bone-dry almost. I added coolant and drove it yesterday without any repeat but it had happened a few times prior to this. I will probably have a leak though so I will have it checked at its service next month.
Any thoughts?
mdrob
=============
MY99 996 (mine)
'01 BMW 325xi (mine)
'04 ML350 (herz)
3y/o daughter and 5 y/o son (Ourz)
Usually you will 'smell' coolant if the resoirvoir is cracked/leaking but look it over very well with a flashlight for crusty residue, then the cap, then check the water pump the same way look for residue or buildup around the puke hole...pressure check the system which will look at the coolant system entirely inc radiator/hoses..last but not least go to the sensor they can false fault ..if all the above ck out good change sensor...just do it
I hate to be the bearer of bad news, but the tank may not be covered by the Certified PreOwned warranty.
One other thought...are you sure that your car is still covered by a CPO agreement - it seems too old to qualify.
So, Step #1 is to simply look at the coolant level when engine is cold. If it appears between the marks on the side of the expansion tank, then a cracked coolant tank is not the problem. If you have been using the correct coolant, then the coolant will be mostly clear and you can just shake the car a little and look at the side of the tank to see the fluid level.
The coolant level is measured by an electronic "float.". "Sunday" driving (autocross, DE's, Tail of the Dragon, etc) have increased G-loads that can momentarily drop the measuring "float" below the predetermined level. Simply shutting down the car for a moment and then restarting will reset the "float alarm." Happens to me from time-to-time on road and track.
As long as the temp gauge reads in the general vacinity of normal, then don't panic.
I thought the same thing. I'm not sure it's possible that a 99 model year car is under CPO. Porsche only certifies cars that are 8 years old or newer and the warranty only lasts for 2 years or 100,000, whichever comes first.
