Check Engine Light on, Multiple Possibilities on Volkswagen Jetta

The Check Engine Light may illuminate due to a faulty oxygen sensor and/or coolant temperature sensor. Proper diagnoses will be required to confirm the fault.

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Average mileage: 152,200 (125,000–180,000)
Exhaust & Emissions affected: 2.0L 4 Cylinder
3 model years affected: 1997, 1998, 1999
10 people reported this problem
3 people shared problem details
1998 Volkswagen Jetta141,000
Mechanic diagnosed the oxygen sensor as malfunctioning, but he cannot fix it. I have to take it to the dealer.
1997 Volkswagen Jetta180,000
I've had problems with both the oxygen sensor sometimes acts up and the temp always reads between 160 and 230.
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