Anyone know if I can read coolant level sensor value with OBDeleven? I think it might be just on-off signal, but that would be useful as well.
The turned on the coolant level warning few times now randomly (in cold weather) even if there is plenty of coolant liquid. I was thinking that I could read the sensor value from OBDeleven and go wiggle the wires to see if there is bad contact somewhere.
This is good info, I'll try to look more closely to the instrument cluster, thank you.
I haven't got the error recently and the only time I got it, it was cold morning with -20 °C outside. Also I took off the connector to the coolant container used a chemical pin cleaner + protector to maybe aid the issue in future.
Are you using genuine G12 / G13 coolant? Plain tap water or filtered water isn't as conductive. Can you measure the resistance of the electrodes from the water bottle itself with the coolant in it (both when the engine is hot and cold)? Is there a drastic difference in electrical resistance?
Edit: I noticed your response mentioned -20*C weather, so I assume you aren't using actual water in your cooling system to risk freezing.
It's not plain tap water, but It's not the genuine one either. I picked it up from local parts store.
The labeling says: - 50% LongLife coolant - Contains corrosion inhibitors and monoethylene glycol. - Anti-freeze up to -36 °C - Replace in 5 years - Partially bio degradable - Color is red, if it's any worth
The whole system got drained from the bottom during the thermostat change so there should be no mixture.
I tried to measure the sensor last time I had the hood open (30min standby after warm engine), but I couldn't get any readings in the 200kΩ range. Not sure what kind of readings it should be giving.
And of course I forgot to re-plug the sensor and got immediate coolant warning. Plugging in the sensor removed the warning, so I guess it's at least partially functioning.
G12+ sounds to be kind of similar stuff (https://www.blauparts.com/vw/vw_fluid/vw_coolant_engine_fluid.shtml)
"Eco-friendly monoethylene glycol based coolant. Phosphate, borate, silicate, nitrite, amine free." "Superior cold temperature performance with freezing protection up to -37° C (50/50 ratio) and up to -52° C (60/40 ratio). Excellent frost protection in severe winter climates." "Contains premium corrosion additives for optimal corrosion prevention for all metals and metal alloys including aluminium in cooling systems. Doesn't eat away at plastic and rubber components of the cooling system."
And of course I forgot to re-plug the sensor and got immediate coolant warning. Plugging in the sensor removed the warning
This is sufficient. Any further fault codes would be an intermittent open circuit in your wiring somewhere. It becomes a time-consuming process just to replace the section of the wiring harness from the coolant bottle to the instrument cluster itself.
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