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can't get rid of this code (16502)...

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Old 07-03-2007, 09:04 AM
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Default can't get rid of this code (16502)...
16502 P0118 Engine Coolant Temp.Circ High Input

i replaced my ECT sensor and my leaking coolant expansion tank. if i try to clear the code, it doesn't even go away... coolant temps read normal on cluster and i don't appear to be losing any coolant...
also, when i replaced my dirty yellow tank with the fresh new white one, i notcied there was/ is a hose going from the bottom of the tank to nothing... is this some sort of pcv pressure release valve or something? or should it be plugged in somewhere? (no coolant coming out of it)
im lost guys! please help!
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Old 07-03-2007, 09:07 AM
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Default thats an overflow line, it should be routed on the cold side of the heatsheild directly below the
tank, just dumps to the ground in case of an overheat.
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Old 07-03-2007, 09:18 AM
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Default what do you mean you cant clear the code? are u sure you're doing it properly?
the hose hanging off the tank is normal
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Old 07-03-2007, 09:36 AM
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Default yes i replaced the ect with the upgraded green one from ecs...
cleared with an obd2 tool and it doesn't clear.
i also ran vag but haven't tried to clear it with that.
what's the after-run thermo switch?
TIA
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Old 07-03-2007, 09:40 AM
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<walks out to garage>
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Old 07-03-2007, 09:48 AM
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Default if that doesn't work try disconnecting your battery, that will clear codes
but it will also set your radio into security mode, so be sure you have access to the security code.
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Old 07-03-2007, 09:50 AM
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Default ok it cleared with the vag tool.. im going to take it for a spin for a few to see
if it pops back up..
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Old 07-03-2007, 09:51 AM
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OT: my other s4 is in safe mode, where can i find the radio code? ok brb
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Old 07-03-2007, 09:52 AM
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it will take 50 miles before it displays any codes again.
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Old 07-03-2007, 09:53 AM
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cant recall at the moment..either trunk, glove box, or owners manual.
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