2004 Subaru Outback How to fix Diagnostic Code Readings

2004 SUBARU OUTBACK
137,687 MILES • 4 CYL • AWD • AUTOMATIC
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BODIEPOSTEL
  • MEMBER
  • 1 POST
My Sabaru recieved three Dianostic Code Readings. Can you tell me what speciifically needs to be fixed?
1. PO420 (Orange light) - Catalyst system efficiency below threshhold, Bank 1.
2. PO302 (Red light) Cylinder 2 misfire detected.
3. PO420 (Pending)
Apr 1, 2010 at 10:29 PM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
Hi bodiepostel,

Thank you for the donation.

P0420 is usually caused by a failing or bad catalytic converter or leakages in the exhaust system..

P0302 is misfiring of cylinder #2. Check the spark plugs and related parts.
Apr 3, 2010 at 10:04 AM
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