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Tundra with CEL how do I resolve this issue

Tiny
ASHLEY29666
  • MEMBER
  • 2001 TOYOTA TUNDRA
  • 190,000 MILES
I have scanned my truck and I Have a P0420 and P0420 pd? What do each of these codes mean? I was told it has something to do with gasses in my catalytic converter. How can I fix this and get rid of this code?
Monday, September 5th, 2011 AT 7:12 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
P0420: Catalyst System Efficiency Below Threshold (Bank 1)

Could be the Cat itself, O2 sensor/s, could be the coolant temperature sensor/s, retarded ignition timing, leaky exhaust manifold and the list goes on-
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Monday, September 5th, 2011 AT 7:21 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
Raz,

Would that code put the vehicle into closed loop, and MPG suffer?

The Medic
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Monday, September 26th, 2011 AT 12:29 AM

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