2007 Subaru WRX running rich and wont idle

2007 SUBARU WRX
50,000 MILES • 4 CYL • AWD • MANUAL
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KSUBARUWRX
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  • 2 POSTS
should the o2 sensor heat up when the key is in the on position
Jun 27, 2010 at 1:52 PM
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MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Hi there,

These are heated O2 sensors, if they are faulty the ECU will go to a full rich reading, this well may be your problem.

mark (mhpautos)
Jun 28, 2010 at 1:41 AM
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KSUBARUWRX
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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
Jun 29, 2010 at 6:12 PM
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