Question about 2003 Volkswagen New Beetle Convertible
2003 VW Beetle 2.0 AVH engine
Had a P2181 code check eng. lt. on. Replaced Coolant temp. Sensor and ECL light went out. 1 month later ECL came back on with same P2181 code. Tried another Coolant temp Sensor but did not fix it. Replaced the water pump, replaced the thermostat twice, replace the temp sensor total of 4 times, Radiator fans working ok, coolant level is correct. Everything seems to be ok but ECL still on. Checked all the fuses that I could find so unless one is hidden they are ok. Checked the electrical connector to the temp sensor but found no broke wires and pin 4 reads 5 volts and pin 2 checks to ground.
What else is there to check?
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...
Posted on Jul 16, 2009
CODE P2181 COOLING SYSTEM PERFORMANCE MALFUNCTION CONDITIONS - ECT SENSOR HAS FAILED. 2.0L ENGINE ECT LOCATION IS ON THE UPPER RADIATOR HOSE CONNECTION AT THE REAR OF THE CYLINDER HEAD. 2.5L ENGINE ECT IS ON THE UPPER RADIATOR HOSE CONNECTION ON THE CYLINDER HEAD ALSO.CHECK COOLING FAN FUSE AND RELAYS
Posted on Jul 26, 2009
check if the brake lights are working,sometimes this puts on the epc light[replace brake light switch if this is so].if not have the fault codes read with a diagnostic machine
Posted on Oct 09, 2009
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
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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