Question about 2004 Volkswagen Jetta
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Posted on Jan 02, 2017
SOURCE: jetta 2003 2l fault code p2182
P2181 Cooling system performance
Check Thermostat operation & Temp sensor for ECU. CHECK ENGINE CCOLANT TEMP SENSOR IN WATERHOSE, NORMALY A 4 PIN PLUG. ON SENSOR SELF PIN 1&3 OR C&D AT 0 degrees
5000-6500 ohms,60 degrees 530-675 ohms,90 degrees
Could also be the cooling fans - I've heard of fixing it by replacing the fan motor and clearing the code as well. The easy fix seems to be the coolant sensor though - I've seen several online threads where owners cleared this code by changing that sensor.
Posted on Aug 07, 2008
Im actually going through the process of fixing this problem with my car. the P2181 is a performance cooling error, usually brought up by thermostat, radiator issues, or ECT sensor. You should narrow it down and check both radiator and thermostat to prevent later issues. If all is well go to your local autozone, pep boys, checkers..etc. and have them erase the DTC error. If you are looking for a more long term solution you can purchase many different software such as VAG-COM or any other software used to run test on vehicals. Be sure you know what you are doing though because messing with your cars computer can have long term effects that can be pricey.
Posted on May 16, 2009
the p2128 code is a Performance Malfunction in Cooling System error and comes from a faulty ECT sensor, radiator issues or a bad thermostat.
Posted on May 16, 2009
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.
Posted on Jul 14, 2009
Trouble Code: P2181
Cooling System Performance Malfunction
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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