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2004 Volkswagen Beetle with engine code P2181, thermostat replacement?

Vehicle: 2004 Volkswagen Beetle

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The P218 code means that you have an issue with the cooling system. Unfortunately, the code doesn't specify the exact problem. You could start by checking for coolant leaks. Make sure the coolant level is at factory specifications. If the level is OK, then replace the thermostat. Here is some more information about the code:

P2181 Volkswagen Code - Cooling System Performance
Read more: https://www.autocodes.com/p2181_volkswagen.html
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P2181 Cooling system performance

This code condition is more for the ECT (engine coolant temperature) sensor.

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