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A P0420 code is "Catalyst System Efficiency Below Threshold (bank 1).
This would indicate that the cat is not getting quite hot enough, or is simply worn out, and is no longer performing its job.
Bank one is considered the side of the engine with the #1 spark plug, which is the cylinder farthest forward.
What else can I help you with?
What is the meaning of code PO420 on a 1998 Toyota Tacoma?
look it up on yahoo as engine codes cylinder 2 misfire it happened on mine the other day. 98 2.7 litre 4x4
Why does a 2000 Toyota Camry erratic code po420 what can you do about it?
It's Catalyst system efficiency below threshold
What code is PO420?
Code PO420 is catalytic converter efficiency low bank 1
Toyota dealer checked code PO420 and wants 2K to replace cat Can you use an after-market cat on a 2002 Tacoma v6 engine tag say meets CA and Fed emissions?
yes you can also they are warranted for 8 years or 80k miles whichever comes first
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catalyst system fault
What causes p0420 code on 2002 Toyota tacoma?
Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1)
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Repair the problem that turned it on and then clear the code with an OBD2 scanner/code reader
2001 Toyota code p1135 where is located?
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