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1996 Ford Explorer CHECK ENGINE LIGHT ON. CODE P0420

Tiny
VCOLLINS
  • MEMBER
  • 1996 FORD EXPLORER
  • 6 CYL
  • 4WD
  • MANUAL
  • 19,800 MILES
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?
Friday, September 10th, 2010 AT 1:41 PM

4 Replies

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
does this vehicle have dual exhaust?
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Friday, September 10th, 2010 AT 1:49 PM
Tiny
VCOLLINS
  • MEMBER
  • 2 POSTS
No, it doesnt.
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Friday, September 10th, 2010 AT 2:09 PM
Tiny
LEGITIMATE007
  • 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.
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Friday, September 10th, 2010 AT 2:21 PM
Tiny
VCOLLINS
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  • 2 POSTS
Thats my luck. The most costly part of the exhaust system! Thanks for your expert advise!
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Friday, September 10th, 2010 AT 2:25 PM

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