Check Engine Light Due to Oxygen and/or Coolant Temperature Sensor Fault on Volkswagen Jetta

Problem Description and Possible Solution

The Check Engine Light may illuminate as a result of a oxygen sensor and coolant temperature sensor fail. Replacement if the failed part will be necessary to correct this issue.


Problem Data
RepairPal Verified
Average mileage: 101,136 (40,000–168,952)
Exhaust & Emissions affected: 2.0L 4 Cylinder
4 model years affected: 1993, 2000, 2004, 2005
12 people reported this problem
Viewing 1 - 5 of 5 comments
CHECK ENGINE LIGHT- MULTIPLE TIMES WITH COOLANT SENSOR FAILURE
Replaced thermostat
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.
engine light came on and ended up being a coolant issue and was the themostate.
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).