this is bugging the hell outa me my add coolant light and buzzer come on when i start my car. but as soon as it warms up it goes away (at the same time as the aws goes off). i wouldnt mind just the light but the buzzer is anoying. my coolant level has stayed the same too. im not eating any coolant. on a side note my check engine light also comes on during hard aceleration.

 

fill up yer coolant, its low man

 

nope, it isnt.

 

mine does somewhat the same thing im getting really sick of it.Im tempted to just take the buzzer out.

 

if the check engine light is on pull the code also check for any little coolant leaks you may find some somewhere also check the overflow make sure it is full

 

the check engine light only 'blips' on for a few seconds and goes off as soon as i let off the WOT it goes off. the coolant overflow is more the full (due to me making sure i had enuff coolant and it wasnt eating it). ill check for leaks but im pretty sure its electrical or something of that nature. thanks for all the help thus far guys keep it coming

 

8 times out of 10 you need a rebuild if you are loosing coolant and have no leaks.

 

but im not losing coolant

 

u may be burning it and the overflow means nothing. you need to actually open the radiator cap and the water neck.

 

The ADD COOLANT warning indicates radiator level is low, not the overflow bottle. You probably have a bit of air in the system. Make sure you bleed the air out of the system as you fill it.

 

is there an air bleeder valve on the rad that i should be using when i fill it? i flushed the rad 2weeks ago when i did a 60k tune up. ill probably do one again this week.

 

S4 yes, S5 no.

 

whats the best way to let air out while you fill it with coolant on an s5 then?

 

Make sure the heater is fully open. Fill the system up, turn the engine on and watch for air bubbles coming out the filler neck. Add more coolant as required. Keep doing this until no more air comes out, then put the cap on and go for a drive. Let it cool down and check it again.

 

i had this buzzer problem too, i added coolant and reset my ecu right after and it went away for good. =)

 

The ECU is not connected to the coolant level warning system in any way. Adding coolant stopped the warning, not resetting the ECU.

 

??thats wierd??? i dont think i reset just the ecu, maybe i did more than that, cause all i did was take the negative off the battery terminal, stompped on the breaks a few times and reconnected it. maybe its just coincidence, the day i unplug is when it stopped buzzin for good.

 

i just posted something like this couple a weeks ago!! its probly just air in the lines/radiator!! i opened the bleeder valve on the hose and some air came out, i doesnt do it anymore now!!

https://www.rx7club.com/forum/showth...+coolant+light

thanx NZConvertible

chris

 

Oh man, I thought i had no leaks too. But I found out my heater return hose leaked ONLY sometimes on a cold startup!

Fixed that now!