Engine Performance problem
2007 Subaru WRX 4 cyl All Wheel Drive Manual 50000 miles
should the o2 sensor heat up when the key is in the on position
have the same problem?
Sunday, June 27th, 2010 AT 1:52 PM
These are heated O2 sensors, if they are faulty the ECU will go to a full rich reading, this well may be your problem.
Monday, June 28th, 2010 AT 1:41 AM
Which o2 sensor? The car has two. The front one is considered to be a a/f sensor but looks just like a o2 sensor. The other is after the turbo. Also the bov starts flowing air when I plug the vacuum line in