friedrichschneider1
Ibiza Coolant Loss Investigation
Summary of the thread
A 2005 Seat Ibiza diesel is experiencing coolant loss, triggering the check engine light. Despite no visible leaks from the radiator or hoses, a diagnostic check indicates a potential issue with a cable or plug. Suggestions include checking the water pump and considering a sensor problem. Ultimately, the issue is resolved by fixing a bad plug connection causing a false positive for low coolant, confirmed by a professional repair.
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4 comment(s)
friedrichschneider1 (community.author)
That's interesting. Did your check engine light also come on, and was there an error stored related to low coolant, or something else?
miaklein1
Yes, same thing happened to me with the check engine light and a stored error code. It wasn't a big coolant leak, but a sensor problem. I'd still check the water pump to be sure, but if you don't see anything obvious, a shop might be the best way to figure out the sensor issue.
friedrichschneider1 (community.author)
Took the Ibiza to the shop. The ECM was giving a false positive for low coolant because of a bad plug connection, just like you said. 95€ later and it's fixed. Thanks for the advice!
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SEAT
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IBIZA
miaklein1
Low coolant on an Ibiza sounds familiar. Check the water pump and radiator hoses. I had a similar problem; it could be a small coolant leak that's hard to see at first.