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Re: Engine light wont turn off
P2181 is a overheating engine, the engine is probably dieseling because it is badly overheated, dieseling is when the engine keeps running after the key is turned off and makes a knocking type noise, this can be caused by a defective thermostat, low coolant level, blown head gasket and other thing as well. You need to get this looked at before you destroy the engine.
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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
If the check engine light is On the owner would have performed a scan on his car which would have given him some error code and the code will indicate that thermostat is faulty. Is the code p2181? if it is i think the thermostat is faulty and needs to be replaced.
this is a coolant performance code. Usuallly sets this code if the connector was left unhooked to the coolant sensor or the thremostat is stuck open. By any chance do you have a gauge that seems to be on the cold side ??
Hi,first thing your cambelt and tensioner should have been replaced 13k miles ago,it would pay you to replace the water pump at the same time as they are known for impellor failure = cooling system fault=P2181 code,hope this helps.
P2181 is a overheating engine.
Bad fan themoswitch,
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).