Question about 1998 Volkswagen Jetta
I have had no problems w/ my 98 jetta until today... the check engine light was flashing and the car kept stalling out. It seems to run ok right now, but the light is still on (steadily) and sometimes the engie will idle down like it is going to stall. what could the problem be. I am used to ford problems not volkswagon. please help!
One possible cause: many cars use the engine coolant temperature sensor to control idle speed and to shut down a dangerously overheated engine. if this sensor is sending a false signal, the controller will not know that and it will continue to listen to it. your task is to try and see if this signal is true or false. do this by measuring (USING A HAND-HELD MULTIMETER SET TO LOW OHMS RESISTANCE TEST) the resistance change across this sensor identified by a blue/white or yellow/red wire at one connector and a brown/green wire at the other connector. the sensor is located near the thermostat on the hot side of the coolant outlet from engine. if you find no change in ohms or find infinity ohms or always zero ohms, change the sensor and the light may fix itslef over time.
Posted on May 15, 2008
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