Check Engine Light Due to Ignition Component/Engine Coolant Temperature Sensor Failure on Volkswagen Jetta

Due to an ignition component and/or engine coolant temperature sensor failure, the Check Engine Light may illuminate. Replacement of the failed component will be necessary to correct this concern.

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Average mileage: 91,264 (35,000–167,275)
6 model years affected: 2000, 2001, 2002, 2003, more2004, 2005
32 people reported this problem
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Viewing 1 - 14 of 14 problem details
2005 Volkswagen Jetta 82,000 mi,
check engine light has come on the code read p2181 which is cooling system malfunction. I have changed the ect sensor but still have the engine light on.
2002 Volkswagen Jetta 112,000 mi,
Coolant System malfunction. It was only the water temperature sender. It is a $15 part and a 10 minute fix if you want to do it yourself. It is very easy. You will probably pay a couple hundred bucks if you take it to the shop.
2004 Volkswagen Jetta 78,966 mi,
Had the water pump and timing belt replaced and have been back numerous times because check engine light keep coming on. Have changed the temperature sensor and still come on..
2001 Volkswagen Jetta 167,275 mi,
my car would not pass smog, the check engine light goes off and on, now my car will not start.
2003 Volkswagen Jetta 35,000 mi,
Service engine soon light was lit, dealer determined the problem and replaced the temperature sender.
2003 Volkswagen Jetta 166,000 mi,
my car would have very rough start ups and at first i figured it was bad spark plugs until i researched it and found out it was a faulty coolant temp. sensor, after replacing the car no longer has rough start ups and i maintain regular 3 month maintanance
2003 Volkswagen Jetta 89,000 mi,
CEL - changed the temp sender, but still have the problem
2003 Volkswagen Jetta 105,000 mi,
pending fix.
2003 Volkswagen Jetta 93,105 mi,
engine lite on dashboard (yellow) on as of august 2015, diagnosed by mechanic as coolant-sensor "troublemaker". repair has to wait,can not afford an other expense .Electrical problems are part of this product, as headlite,taillite,back-up,stoplites need repairs (replacements) on a by annual interval !
2000 Volkswagen Jetta 136,368 mi,
Leak found in coolant temp
2004 Volkswagen Jetta 149,099 mi,
Ignition light stays on n
2005 Volkswagen Jetta 40,000 mi,
Replaced fan, thermostat, and coolant.
I repaired at dealership
2001 Volkswagen Jetta 125,000 mi,
My temp gauge goes up to 190 then drops back down on it's own.