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P0011 - Camshaft positioning sensor 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
it helps to tell what engine you have, there are 8 engines used in that model., but its a coolant sensor issue. I would pay a shop thats familiar with VW to check it out and recommend repairs.
this is a cooling system performance issue. You could get it diagnosed to be sure but 9 times out of 10 it a bad thermostat. Car is most likely running too cold when cruising.
Cooling System Performance Malfunction Possible Causes:
ECT sensor has failedECT Sensor (on Radiator) has failedECT sensor signal circuit is open (inspect wiring & connector)ECT sensor signal circuit is shortedCooling system malfunction, or the thermostat is stuckEngine not operating at normal operating temperatureEOT sensor is damaged or it has failed
The fan assy does come out of there. It's definitely a DIY job. I believe it's just 3/4 screws and the wiring harness. I had to replace a fan about a year ago and it was pretty simple, aside from there not being enough room in there for my hands. I believe the screws are T25 or T20 torx screws. Failure of a fan is pretty common on the MKIV VW's...
P2181 is a overheating engine.
Can be:
Bad fan themoswitch,
temp sensor
themostat
water pump impeller
fan motor or fuse on battery
check to see if fans work by turning on Air Conditioner (fans should run with A/C on).
Turn A/C off, warm engine, check to see if fans come on, if they do NOT it may be thermo switch on radiator on lower left side, has 3 wire plug, takes 1-1/8" wrench/socket to remove. This thermo switch controls fans when temp reaches 195F, if fans do not come on at engine temp 190-195F try
replace switch VW part number: 1J0-959--481-A You can verify if the switch is bad by shorting wire 1 and 2 (fans should come on when jumpered).
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