Question about 2004 Volkswagen Beetle

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I have a 2004 VW Beetle. I keep getting the engine diagnostic code P2181. This code is not in my manual. What is it?

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Trouble Code: P2181

Cooling System Performance Malfunction
Possible Causes:


ECT sensor has failed ECT Sensor (on Radiator) has failed ECT sensor signal circuit is open (inspect wiring & connector) ECT sensor signal circuit is shorted Cooling system malfunction, or the thermostat is stuck Engine not operating at normal operating temperature EOT sensor is damaged or it has failed

Posted on Sep 28, 2009

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Check to make sure you have the green CTS (coolant temp switch). alot of cars had a faulty black ones. even the green ones are know to go bad. usually get horrible gas mileage and stuff like that!

Posted on Nov 30, 2009

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This is the code for cooling system performance. Possible causes could be the wrong mixture of coolant, water pump going out, low coolant level or pressure cap is bad.

Posted on Sep 28, 2009

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1 Answer

My car is running codes P0011 and P2181. Can you tell me what that is please. 2004 vw jetta gl


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P2181 - Engine cooling temperature sensor.
If you have a repair manual (chilton/haynes/etc) these should be fairly simple fixes.
Camshaft positioning sensor for my car was $35 and took about 15 minutes to change.

2carpros.com suggested the P2181 is also fairly easy to replace
http://www.2carpros.com/questions/volkswagen-jetta-2004-volkswagen-jetta-code-p2181-engine-cooling-performance

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CHECK ENGINE LIGHT IS ON AND SO IS THE AIR BAG LIGHT


I recommend taking your car to your local auto parts store like AutoZone. They will hook up their diagnostic computer free of charge and generate your error codes. They can also decode the codes and tell you what may be the proximate cause. Same thing the VW Dealer will do for a charge of $65 (but AutoZone is FREE). One of the codes probably relates to a bad seal on your gas cap (try removing, cleaning and replacing). One of the other codes might be indicative of a bad oxygen sensor. They cost $20+, so you want to be certain before you start a replacement. There are between 2-3 oxygen sensors on your car.

Sorry I couldn't be more descriptive.

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I have a 2003 vw beetle 2.0 and I went to Advance when the check engine light came on. The diagnostic tester said its a P2181 which I found out was a coolant temperature sensor warning, so I paid some...


The ECT sensor is right below the air compartment on the drivers side of the engine compartment. it is sticking up and should have some green on it. I don't have a picture right this moment but i will post one tomorrow. Also the P2181 error code is a Performance Malfunction in Cooling System. It can all be the radiator and or thermostat.

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the p2128 code is a Performance Malfunction in Cooling System error and comes from a faulty ECT sensor, radiator issues or a bad thermostat.

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