1996 Ford Explorer CHECK ENGINE LIGHT ON.. CODE P0420

1996 FORD EXPLORER
19,800 MILES • 6 CYL • 4WD • MANUAL
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VCOLLINS
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I KNOW THIS CODE INVOLVES THE CATALYTIC CONVERTER.. I HAD MY WHOLE MUFFLER REPLACED JUST A COUPLE OF YEARS AGO.. DO I REALLY HAVE TO REPLACE IT?
Sep 10, 2010 at 6:41 AM
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LEGITIMATE007
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P0420 Catalyst System Efficiency Below Threshold (Bank 1)
does this vehicle have dual exhaust??
Sep 10, 2010 at 6:49 AM
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VCOLLINS
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No, it doesnt.
Sep 10, 2010 at 7:09 AM
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LEGITIMATE007
  • ✓Experienced Mechanic
  • 5,121 POSTS
sounds like the exhaust manifold may have a leak. however it could be the cat too. im pretty sure you wont need to replace the whole exhaust system, mostlikely just the Cat.
Sep 10, 2010 at 7:21 AM
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VCOLLINS
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thats my luck.. the most costly part of the exhaust system! thanks for your expert advise!!
Sep 10, 2010 at 7:25 AM
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