Volkswagen Jetta Problem Report
Volkswagen Jetta Check Engine Light Due to Oxygen and/or Coolant Temperature Sensor Fault
CHECK ENGINE LIGHT- MULTIPLE TIMES WITH COOLANT SENSOR FAILURE - Visitor
Replaced thermostat - Visitor
All of sudden while driving my check engine icon lit up. Had a dealership run the code and was a bad O2 sensor. Haven't replaced it yet since I am not too concerned due to it being only an emissions issue however I have noticed about a 30% decrease in my fuel economy since the O2 sensor failed. I was quoted that the repair will run me around $200 - $250 including labor. - Visitor
engine light came on and ended up being a coolant issue and was the themostate. - Visitor
Temp Sensor failed, which made the engine light to go off. VW quoted me at around $600. Got it repaired at a private auto shop for less than $200 (if I remember correctly). - jchattori
The Check Engine Light may illuminate due to a faulty oxygen sensor and/or coolant temperature...
Oxygen sensor and coolant temperature sensor failures are common.
Poor drivability symptoms—including hard starting—can be caused by coolant temp...
i have a po112 code showing need to know what it is and were it is .